CottonTail 6- & 12-hour
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Race Information
Can you run for one hour, or four hours, or six hours, OR make the day and run for all twelve hours??? Endless Trails will be there all day long to count your laps, cheer you on, and motivate you with stickers and awesome raffle prizes, and they even hide Easter eggs worth bonus raffle "tickets" throughout the day to keep things interesting! This race features tasty homemade soup, pictures from the one and only Glenn Tachiyama, and other great ultra fare until your legs stop wanting to go out on more loops.
Related Events
Did you know that this race is part of a series of runs? If you like this race you may want to run one of the following Endless Trails events.
Trail
Run Pick of the Month - Portland Marathon
Run Rose City's signature premier running event with a marathon, half marathon, and 10K, happening October 5, 2025.
Enjoy a course with gorgeous views of Portland's waterfront, several bridge crossings, and a full tour of some of the city's most iconic landmarks!
Runners will score free race photos and highlight videos, event and sponsor swag - including race medals and event shirt, plus food and drinks at the Finish Line Festival, including a complimentary, Oregon-brewed beer (runners 21+ only).
Save 20% on your registration using code "RG20"
Click the button below to get all the details!
Pace Calculator
Find your running pace and splits, and learn if you can outrun dangerous animals with the RunGuides run pace calculator.
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