The That Dam Hill Marathon and Ultra Races 2025 is a celebrated running event scheduled for Saturday, 20 September 2025, in Springbank Park, London, Ontario. Participants can choose from multiple race distances: Half Marathon (21.1 km), Marathon (42.195 km), 6-hour, 12-hour (night), 24-hour timed races, a 24-hour relay, and a Charity 5K Fun Run/Walk. The course is a certified 1.4-mile (2.325779 km) loop, and the event is a Boston Marathon qualifier. Organized entirely by volunteers, all net proceeds support cancer research through the Dunn with Cancer initiative, which has raised over $1.2 million since 2020. The event fosters a supportive and festive atmosphere, welcoming runners and walkers of all abilities.
Races
100 km
100 km
50 miles
50 miles
Marathon
Half Marathon
5 km
Kicking off at 8:00 AM, this 24-hour challenge invites runners to test physical and mental limits while looping Springbank Park’s certified course. Held on September 20, 2025, and organized by the TDH Organizing Committee, this ultra event rewards participants who reach 100 km or more with a custom belt buckle, celebrating true endurance.
The 24-Hour Team Relay takes place on September 20, 2025, at Springbank Park, London, Ontario, and is organized by the TDH Organizing Committee as a charity event for the Brain Tumour Foundation of Canada.
Runners have six hours from the 8:00 AM start time on September 20, 2025, to complete as many loops as possible on the certified course at Springbank Park. Hosted by the TDH Organizing Committee, this timed event is ideal for athletes testing ultra distances in a structured, scenic, and well-supported race environment.
Offering a unique nighttime endurance challenge, this 12-hour race runs from 8:00 PM to 8:00 AM along the same certified loop course in Springbank Park. Participants must wear headlamps and reflective gear. Organized by the TDH Organizing Committee, this event promises a memorable atmosphere under the stars for both new and seasoned ultra runners.
Marathon runners at That Dam Hill complete a Boston-qualifying course made up of one partial loop and 18 full loops of the 2.325779 km route in Springbank Park. Held on September 20, 2025, and organized by the TDH Organizing Committee, the race offers flat terrain and a community-supported environment perfect for fast times and personal goals.
Taking place in London’s lush Springbank Park, the Half Marathon starts at 8:00 AM on September 20, 2025. Participants complete one partial loop and nine full laps of the certified 2.325779 km course. The TDH Organizing Committee delivers a supportive, timed, and qualifying race ideal for both competitive runners and weekend warriors.
The Charity 5K Fun Run/Walk takes place on Saturday, September 20, 2025, at Springbank Park, London, Ontario, organized by the TDH Organizing Committee in support of the Brain Tumour Foundation of Canada.
Weather based on historical averages.
FAQs
What is the That Dam Hill 24 Hour?
How long is the That Dam Hill 24 Hour?
Where does the That Dam Hill 24 Hour take place?
What is the elevation gain of the That Dam Hill 24 Hour?
How can I prepare for the That Dam Hill 24 Hour?
How do I choose the right training plan for the That Dam Hill 24 Hour?
Kicking off at 8:00 AM, this 24-hour challenge invites runners to test physical and mental limits while looping Springbank Park’s certified course. Held on September 20, 2025, and organized by the TDH Organizing Committee, this ultra event rewards participants who reach 100 km or more with a custom belt buckle, celebrating true endurance.
The That Dam Hill 24 Hour is 100km long.
The That Dam Hill 24 Hour takes place in London, ON, Canada.
Runna classifies the That Dam Hill 24 Hour elevation profile as Rolling.
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the That Dam Hill 24 Hour?
Kicking off at 8:00 AM, this 24-hour challenge invites runners to test physical and mental limits while looping Springbank Park’s certified course. Held on September 20, 2025, and organized by the TDH Organizing Committee, this ultra event rewards participants who reach 100 km or more with a custom belt buckle, celebrating true endurance.
How long is the That Dam Hill 24 Hour?
The That Dam Hill 24 Hour is 100km long.
Where does the That Dam Hill 24 Hour take place?
The That Dam Hill 24 Hour takes place in London, ON, Canada.
What is the elevation gain of the That Dam Hill 24 Hour?
Runna classifies the That Dam Hill 24 Hour elevation profile as Rolling.
How can I prepare for the That Dam Hill 24 Hour?
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the That Dam Hill 24 Hour?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the That Dam Hill 24 Hour Team (Charity)?
How long is the That Dam Hill 24 Hour Team (Charity)?
Where does the That Dam Hill 24 Hour Team (Charity) take place?
What is the elevation gain of the That Dam Hill 24 Hour Team (Charity)?
How can I prepare for the That Dam Hill 24 Hour Team (Charity)?
How do I choose the right training plan for the That Dam Hill 24 Hour Team (Charity)?
The 24-Hour Team Relay takes place on September 20, 2025, at Springbank Park, London, Ontario, and is organized by the TDH Organizing Committee as a charity event for the Brain Tumour Foundation of Canada.
The That Dam Hill 24 Hour Team (Charity) is 100km long.
The That Dam Hill 24 Hour Team (Charity) takes place in London, ON, Canada.
Runna classifies the That Dam Hill 24 Hour Team (Charity) elevation profile as Rolling.
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the That Dam Hill 24 Hour Team (Charity)?
The 24-Hour Team Relay takes place on September 20, 2025, at Springbank Park, London, Ontario, and is organized by the TDH Organizing Committee as a charity event for the Brain Tumour Foundation of Canada.
How long is the That Dam Hill 24 Hour Team (Charity)?
The That Dam Hill 24 Hour Team (Charity) is 100km long.
Where does the That Dam Hill 24 Hour Team (Charity) take place?
The That Dam Hill 24 Hour Team (Charity) takes place in London, ON, Canada.
What is the elevation gain of the That Dam Hill 24 Hour Team (Charity)?
Runna classifies the That Dam Hill 24 Hour Team (Charity) elevation profile as Rolling.
How can I prepare for the That Dam Hill 24 Hour Team (Charity)?
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the That Dam Hill 24 Hour Team (Charity)?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the That Dam Hill 6 Hour Timed Race?
How long is the That Dam Hill 6 Hour Timed Race?
Where does the That Dam Hill 6 Hour Timed Race take place?
What is the elevation gain of the That Dam Hill 6 Hour Timed Race?
How can I prepare for the That Dam Hill 6 Hour Timed Race?
How do I choose the right training plan for the That Dam Hill 6 Hour Timed Race?
Runners have six hours from the 8:00 AM start time on September 20, 2025, to complete as many loops as possible on the certified course at Springbank Park. Hosted by the TDH Organizing Committee, this timed event is ideal for athletes testing ultra distances in a structured, scenic, and well-supported race environment.
The That Dam Hill 6 Hour Timed Race is 80km long.
The That Dam Hill 6 Hour Timed Race takes place in London, ON, Canada.
Runna classifies the That Dam Hill 6 Hour Timed Race elevation profile as Rolling.
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the That Dam Hill 6 Hour Timed Race?
Runners have six hours from the 8:00 AM start time on September 20, 2025, to complete as many loops as possible on the certified course at Springbank Park. Hosted by the TDH Organizing Committee, this timed event is ideal for athletes testing ultra distances in a structured, scenic, and well-supported race environment.
How long is the That Dam Hill 6 Hour Timed Race?
The That Dam Hill 6 Hour Timed Race is 80km long.
Where does the That Dam Hill 6 Hour Timed Race take place?
The That Dam Hill 6 Hour Timed Race takes place in London, ON, Canada.
What is the elevation gain of the That Dam Hill 6 Hour Timed Race?
Runna classifies the That Dam Hill 6 Hour Timed Race elevation profile as Rolling.
How can I prepare for the That Dam Hill 6 Hour Timed Race?
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the That Dam Hill 6 Hour Timed Race?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the That Dam Hill 12 Hour?
How long is the That Dam Hill 12 Hour?
Where does the That Dam Hill 12 Hour take place?
What is the elevation gain of the That Dam Hill 12 Hour?
How can I prepare for the That Dam Hill 12 Hour?
How do I choose the right training plan for the That Dam Hill 12 Hour?
Offering a unique nighttime endurance challenge, this 12-hour race runs from 8:00 PM to 8:00 AM along the same certified loop course in Springbank Park. Participants must wear headlamps and reflective gear. Organized by the TDH Organizing Committee, this event promises a memorable atmosphere under the stars for both new and seasoned ultra runners.
The That Dam Hill 12 Hour is 80km long.
The That Dam Hill 12 Hour takes place in London, ON, Canada.
Runna classifies the That Dam Hill 12 Hour elevation profile as Rolling.
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the That Dam Hill 12 Hour?
Offering a unique nighttime endurance challenge, this 12-hour race runs from 8:00 PM to 8:00 AM along the same certified loop course in Springbank Park. Participants must wear headlamps and reflective gear. Organized by the TDH Organizing Committee, this event promises a memorable atmosphere under the stars for both new and seasoned ultra runners.
How long is the That Dam Hill 12 Hour?
The That Dam Hill 12 Hour is 80km long.
Where does the That Dam Hill 12 Hour take place?
The That Dam Hill 12 Hour takes place in London, ON, Canada.
What is the elevation gain of the That Dam Hill 12 Hour?
Runna classifies the That Dam Hill 12 Hour elevation profile as Rolling.
How can I prepare for the That Dam Hill 12 Hour?
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the That Dam Hill 12 Hour?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the That Dam Hill Marathon?
How long is the That Dam Hill Marathon?
Where does the That Dam Hill Marathon take place?
What is the elevation gain of the That Dam Hill Marathon?
How can I prepare for the That Dam Hill Marathon?
How do I choose the right training plan for the That Dam Hill Marathon?
Marathon runners at That Dam Hill complete a Boston-qualifying course made up of one partial loop and 18 full loops of the 2.325779 km route in Springbank Park. Held on September 20, 2025, and organized by the TDH Organizing Committee, the race offers flat terrain and a community-supported environment perfect for fast times and personal goals.
The That Dam Hill Marathon is 42km long.
The That Dam Hill Marathon takes place in London, ON, Canada.
Runna classifies the That Dam Hill Marathon elevation profile as Rolling.
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the That Dam Hill Marathon?
Marathon runners at That Dam Hill complete a Boston-qualifying course made up of one partial loop and 18 full loops of the 2.325779 km route in Springbank Park. Held on September 20, 2025, and organized by the TDH Organizing Committee, the race offers flat terrain and a community-supported environment perfect for fast times and personal goals.
How long is the That Dam Hill Marathon?
The That Dam Hill Marathon is 42km long.
Where does the That Dam Hill Marathon take place?
The That Dam Hill Marathon takes place in London, ON, Canada.
What is the elevation gain of the That Dam Hill Marathon?
Runna classifies the That Dam Hill Marathon elevation profile as Rolling.
How can I prepare for the That Dam Hill Marathon?
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the That Dam Hill Marathon?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the That Dam Hill Half Marathon?
How long is the That Dam Hill Half Marathon?
Where does the That Dam Hill Half Marathon take place?
What is the elevation gain of the That Dam Hill Half Marathon?
How can I prepare for the That Dam Hill Half Marathon?
How do I choose the right training plan for the That Dam Hill Half Marathon?
Taking place in London’s lush Springbank Park, the Half Marathon starts at 8:00 AM on September 20, 2025. Participants complete one partial loop and nine full laps of the certified 2.325779 km course. The TDH Organizing Committee delivers a supportive, timed, and qualifying race ideal for both competitive runners and weekend warriors.
The That Dam Hill Half Marathon is 21km long.
The That Dam Hill Half Marathon takes place in London, ON, Canada.
Runna classifies the That Dam Hill Half Marathon elevation profile as Rolling.
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the That Dam Hill Half Marathon?
Taking place in London’s lush Springbank Park, the Half Marathon starts at 8:00 AM on September 20, 2025. Participants complete one partial loop and nine full laps of the certified 2.325779 km course. The TDH Organizing Committee delivers a supportive, timed, and qualifying race ideal for both competitive runners and weekend warriors.
How long is the That Dam Hill Half Marathon?
The That Dam Hill Half Marathon is 21km long.
Where does the That Dam Hill Half Marathon take place?
The That Dam Hill Half Marathon takes place in London, ON, Canada.
What is the elevation gain of the That Dam Hill Half Marathon?
Runna classifies the That Dam Hill Half Marathon elevation profile as Rolling.
How can I prepare for the That Dam Hill Half Marathon?
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the That Dam Hill Half Marathon?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the That Dam Hill Charity 5K Fun Run/Walk?
How long is the That Dam Hill Charity 5K Fun Run/Walk?
Where does the That Dam Hill Charity 5K Fun Run/Walk take place?
What is the elevation gain of the That Dam Hill Charity 5K Fun Run/Walk?
How can I prepare for the That Dam Hill Charity 5K Fun Run/Walk?
How do I choose the right training plan for the That Dam Hill Charity 5K Fun Run/Walk?
The Charity 5K Fun Run/Walk takes place on Saturday, September 20, 2025, at Springbank Park, London, Ontario, organized by the TDH Organizing Committee in support of the Brain Tumour Foundation of Canada.
The That Dam Hill Charity 5K Fun Run/Walk is 5km long.
The That Dam Hill Charity 5K Fun Run/Walk takes place in London, ON, Canada.
Runna classifies the That Dam Hill Charity 5K Fun Run/Walk elevation profile as Flat.
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the That Dam Hill Charity 5K Fun Run/Walk?
The Charity 5K Fun Run/Walk takes place on Saturday, September 20, 2025, at Springbank Park, London, Ontario, organized by the TDH Organizing Committee in support of the Brain Tumour Foundation of Canada.
How long is the That Dam Hill Charity 5K Fun Run/Walk?
The That Dam Hill Charity 5K Fun Run/Walk is 5km long.
Where does the That Dam Hill Charity 5K Fun Run/Walk take place?
The That Dam Hill Charity 5K Fun Run/Walk takes place in London, ON, Canada.
What is the elevation gain of the That Dam Hill Charity 5K Fun Run/Walk?
Runna classifies the That Dam Hill Charity 5K Fun Run/Walk elevation profile as Flat.
How can I prepare for the That Dam Hill Charity 5K Fun Run/Walk?
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the That Dam Hill Charity 5K Fun Run/Walk?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
More
Sport:
Running
Qualifier:
Boston Marathon Qualifier
Tags:
Boston Marathon Qualifier
Night Run
Relay
Fun Run
This event listing is for informational purposes only. Runna is not affiliated with, endorsed by, or sponsored by That Dam Hill Marathon and Ultra Races 2025 or TDH Organizing Committee. All event details are based on publicly available information and are provided solely to help users discover running events. Runna does not use any official logos, images, or proprietary content from this event or its organiser. Any trademarks or names mentioned are used descriptively to identify the event in a factual manner. For the most accurate and up to date information (including to register or purchase an entry to the event), please visit the That Dam Hill Marathon and Ultra Races 2025 website.
