The Mountain Madness Half Marathon is one of the oldest races in Steamboat Springs and the Steamboat Springs Running Series.
Entering its 27th year, the Mountain Madness races are held in conjunction with the popular Rainbow Weekend.
"It's one of the more heavily participated in races," said Chuck O'Connell, race director and Steamboat area manager for Christy Sports. "I think that's because there are two races."
In addition to the half marathon -- a 13-mile race -- participants can register for the 10K.
Last year, Mike Knutson won the men's half marathon in 1 hour, 19 minutes, 53 seconds. Sarah Walker won the women's half marathon in 1:35:04.
The 10K men's winner was Mike Mangaus in 39:18. Melissa Short was the women's winner in 44:07.
Both courses, and the free two-mile fun run, use the scenic River Road, which follows the Yampa River out of town. The half-marathon course is a rolling course with a 1.5-mile steep hill at Mile 4. The course is paved except for one out-and-back section on dirt road.
The 10K course is fairly flat, following Rout County Road 14, or River Road, that is partially dirt. It's an out-and-back race.
The two-mile fun run follows River Road out and back, and this race is not officially timed.
Pre-registration is still available through noon today at the Christy Sports store in Central Park Plaza. A no-frills entrance fee is $15. Otherwise, the pre-registration rate is $20.
Race day registration begins at 7 a.m. Sunday and is available on site for $25, which includes a T-shirt and a raffle. The half marathon and 10K begin at 8 a.m. Sunday. The two-mile fun run begins at 8:15 a.m. Sunday. The starting line and registration site for all three races is at the Howelsen Hill tennis courts.
The half-marathon and 10K races will have aid stations, as well.
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