The Arc of Attrition by UTMB will take place from 22 to 25 January 2026 along the wild and beautiful coast of Cornwall, England. This winter ultra-running festival features four distances: the Arc 100 (162 km), Arc 50 (81 km), Arc 25 (40 km), and Arc 12 (20 km), each following rugged coastal trails with steep climbs and dramatic sea views. Known for its harsh weather, technical terrain, and stunning scenery, the event tests endurance and skill while rewarding runners with one of the UK’s most iconic trail running experiences.
Races
100 mile
50 mile
25 mile
12 Mile
Race Date:
23 January, 2026
The Arc 100 by UTMB is a 162 km point-to-point ultra that runs from Coverack to Porthtowan along the rugged South West Coast Path in Cornwall, with a strict 36-hour cutoff.
Race Date:
24 January, 2026
The Arc 50 by UTMB is a grueling 81 km point-to-point ultramarathon along Cornwall’s dramatic South West Coast Path, starting at the Minack Theatre in Porthcurno and finishing in Porthtowan. It’s due to take place on Saturday, 24 January 2026, with a 15.5 hour cut-off and several mandatory aid stations and safety checkpoints along the course.
Race Date:
25 January, 2026
The Arc 25 race by UTMB is scheduled for Sunday, 25 January 2026, starting near St Ives and finishing in Porthtowan, Cornwall. It covers approximately 40 km along coastal trails, featuring dramatic terrain, dunes, cliffs, and demanding elevation, with a time cutoff of 8 hours for completion.
Race Date:
25 January, 2026
The Arc 12 by UTMB is a 20 km coastal trail race taking place on Sunday, 25 January 2026, starting near Godrevy and finishing in Porthtowan, Cornwall. It features an undulating route along the South West Coast Path—perfect for runners seeking a shorter yet scenic introduction to the Arc of Attrition.
Weather based on historical averages.
FAQs
What is the Arc 100 Mile?
How long is the Arc 100 Mile?
Where does the Arc 100 Mile take place?
What is the elevation gain of the Arc 100 Mile?
How can I prepare for the Arc 100 Mile?
How do I choose the right training plan for the Arc 100 Mile?
The Arc 100 by UTMB is a 162 km point-to-point ultra that runs from Coverack to Porthtowan along the rugged South West Coast Path in Cornwall, with a strict 36-hour cutoff.
The Arc 100 Mile is 162km long.
The Arc 100 Mile takes place in Porthtowan, Cornwall, UK.
The Arc 100 Mile elevation gain is 4900 metres, which Runna classifies as a Hilly 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!
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 Arc 100 Mile?
The Arc 100 by UTMB is a 162 km point-to-point ultra that runs from Coverack to Porthtowan along the rugged South West Coast Path in Cornwall, with a strict 36-hour cutoff.
How long is the Arc 100 Mile?
The Arc 100 Mile is 162km long.
Where does the Arc 100 Mile take place?
The Arc 100 Mile takes place in Porthtowan, Cornwall, UK.
What is the elevation gain of the Arc 100 Mile?
The Arc 100 Mile elevation gain is 4900 metres, which Runna classifies as a Hilly race.
How can I prepare for the Arc 100 Mile?
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 Arc 100 Mile?
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 Arc 50 Mile?
How long is the Arc 50 Mile?
Where does the Arc 50 Mile take place?
What is the elevation gain of the Arc 50 Mile?
How can I prepare for the Arc 50 Mile?
How do I choose the right training plan for the Arc 50 Mile?
The Arc 50 by UTMB is a grueling 81 km point-to-point ultramarathon along Cornwall’s dramatic South West Coast Path, starting at the Minack Theatre in Porthcurno and finishing in Porthtowan. It’s due to take place on Saturday, 24 January 2026, with a 15.5 hour cut-off and several mandatory aid stations and safety checkpoints along the course.
The Arc 50 Mile is 81km long.
The Arc 50 Mile takes place in Porthtowan, Cornwall, UK.
The Arc 50 Mile elevation gain is 2500 metres, which Runna classifies as a Hilly 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!
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 Arc 50 Mile?
The Arc 50 by UTMB is a grueling 81 km point-to-point ultramarathon along Cornwall’s dramatic South West Coast Path, starting at the Minack Theatre in Porthcurno and finishing in Porthtowan. It’s due to take place on Saturday, 24 January 2026, with a 15.5 hour cut-off and several mandatory aid stations and safety checkpoints along the course.
How long is the Arc 50 Mile?
The Arc 50 Mile is 81km long.
Where does the Arc 50 Mile take place?
The Arc 50 Mile takes place in Porthtowan, Cornwall, UK.
What is the elevation gain of the Arc 50 Mile?
The Arc 50 Mile elevation gain is 2500 metres, which Runna classifies as a Hilly race.
How can I prepare for the Arc 50 Mile?
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 Arc 50 Mile?
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 Arc 25 Mile?
How long is the Arc 25 Mile?
Where does the Arc 25 Mile take place?
What is the elevation gain of the Arc 25 Mile?
How can I prepare for the Arc 25 Mile?
How do I choose the right training plan for the Arc 25 Mile?
The Arc 25 race by UTMB is scheduled for Sunday, 25 January 2026, starting near St Ives and finishing in Porthtowan, Cornwall. It covers approximately 40 km along coastal trails, featuring dramatic terrain, dunes, cliffs, and demanding elevation, with a time cutoff of 8 hours for completion.
The Arc 25 Mile is 40km long.
The Arc 25 Mile takes place in Porthtowan, Cornwall, UK.
The Arc 25 Mile elevation gain is 1000 metres, which Runna classifies as a Hilly 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!
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 Arc 25 Mile?
The Arc 25 race by UTMB is scheduled for Sunday, 25 January 2026, starting near St Ives and finishing in Porthtowan, Cornwall. It covers approximately 40 km along coastal trails, featuring dramatic terrain, dunes, cliffs, and demanding elevation, with a time cutoff of 8 hours for completion.
How long is the Arc 25 Mile?
The Arc 25 Mile is 40km long.
Where does the Arc 25 Mile take place?
The Arc 25 Mile takes place in Porthtowan, Cornwall, UK.
What is the elevation gain of the Arc 25 Mile?
The Arc 25 Mile elevation gain is 1000 metres, which Runna classifies as a Hilly race.
How can I prepare for the Arc 25 Mile?
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 Arc 25 Mile?
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 Arc 12 Mile?
How long is the Arc 12 Mile?
Where does the Arc 12 Mile take place?
What is the elevation gain of the Arc 12 Mile?
How can I prepare for the Arc 12 Mile?
How do I choose the right training plan for the Arc 12 Mile?
The Arc 12 by UTMB is a 20 km coastal trail race taking place on Sunday, 25 January 2026, starting near Godrevy and finishing in Porthtowan, Cornwall. It features an undulating route along the South West Coast Path—perfect for runners seeking a shorter yet scenic introduction to the Arc of Attrition.
The Arc 12 Mile is 20km long.
The Arc 12 Mile takes place in Porthtowan, Cornwall, UK.
The Arc 12 Mile elevation gain is 500 metres, which Runna classifies as a Hilly 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!
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 Arc 12 Mile?
The Arc 12 by UTMB is a 20 km coastal trail race taking place on Sunday, 25 January 2026, starting near Godrevy and finishing in Porthtowan, Cornwall. It features an undulating route along the South West Coast Path—perfect for runners seeking a shorter yet scenic introduction to the Arc of Attrition.
How long is the Arc 12 Mile?
The Arc 12 Mile is 20km long.
Where does the Arc 12 Mile take place?
The Arc 12 Mile takes place in Porthtowan, Cornwall, UK.
What is the elevation gain of the Arc 12 Mile?
The Arc 12 Mile elevation gain is 500 metres, which Runna classifies as a Hilly race.
How can I prepare for the Arc 12 Mile?
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 Arc 12 Mile?
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
Tags:
UTMB
This event listing is for informational purposes only. Runna is not affiliated with, endorsed by, or sponsored by Arc of Attrition by UTMB or UTMB World Series. 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 Arc of Attrition by UTMB website.