The Rat Race 100 is one of the UK’s premier ultra marathon events, offering a tough 100-mile race across diverse and demanding terrains. Participants will face a mix of rugged trails, challenging ascents, and beautiful countryside, as they push themselves to the limits of their endurance. The event is known for its tough course and requires not only physical fitness but also mental resilience to complete. As part of the Rat Race series, the Rat Race 100 attracts seasoned ultra runners from around the world, offering them a chance to conquer one of the toughest challenges in the sport. The event is supported by an organized team, providing aid stations and checkpoints, but the true test lies in the participants' ability to maintain pace and overcome obstacles on the course.
Race Date:
19 July, 2025
From July 19-21, 2025, the Rat Race Castle to Castle 100 Mile challenges ultra-runners to embark on an epic journey across the Scottish Highlands, featuring a demanding 1,479 meters of elevation gain. Organized by Rat Race, this adventure tests endurance as participants traverse rugged landscapes, connecting two historic castles over a grueling 100-mile course.
Weather based on historical averages.
From July 19-21, 2025, the Rat Race Castle to Castle 100 Mile challenges ultra-runners to embark on an epic journey across the Scottish Highlands, featuring a demanding 1,479 meters of elevation gain. Organized by Rat Race, this adventure tests endurance as participants traverse rugged landscapes, connecting two historic castles over a grueling 100-mile course.
The Rat Race Castle to Castle 100 Mile is 161km long.
The Rat Race Castle to Castle 100 Mile takes place in Northumberland, UK.
The Rat Race Castle to Castle 100 Mile elevation gain is 1479 meters, which Runna classifies as a Rolling race.
The best way to train for the next race is to use a personalized 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 personalized 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!
From July 19-21, 2025, the Rat Race Castle to Castle 100 Mile challenges ultra-runners to embark on an epic journey across the Scottish Highlands, featuring a demanding 1,479 meters of elevation gain. Organized by Rat Race, this adventure tests endurance as participants traverse rugged landscapes, connecting two historic castles over a grueling 100-mile course.
The Rat Race Castle to Castle 100 Mile is 161km long.
The Rat Race Castle to Castle 100 Mile takes place in Northumberland, UK.
The Rat Race Castle to Castle 100 Mile elevation gain is 1479 meters, which Runna classifies as a Rolling race.
The best way to train for the next race is to use a personalized 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 personalized 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!
Running
Nature
This event listing is for informational purposes only. Runna is not affiliated with, endorsed by, or sponsored by Rat Race 100 or Rat Race. 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 Rat Race 100 website.