530 miles of high-altitude suffering across the spine of the Rockies - 75% of starters don't finish, and that's the poin
Idaho's most beautiful gravel race. 100 miles through the Pioneer Mountains. Not made to be easy.
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Colorado Trail Race scores 10 points higher overall (90 vs 80), but the right choice depends on what you value most.
"The Colorado Trail doesn't care about your FTP when you're pushing your bike through talus fields at 13,000 feet."
"The gravel pilgrimage that sells itself through pure experience."
Colorado Trail Race rates as the more demanding race based on our composite difficulty score (averaging length, technicality, elevation, climate, and altitude ratings). If you're looking for the bigger challenge, go with Colorado Trail Race. If you want a more accessible race, Rebecca's Private Idaho is the better pick.
Colorado Trail Race scores 90/100 compared to 80/100 in our 15-dimension Gravel God Rating. The overall score reflects course profile, prestige, race quality, community, and value.
Rebecca's Private Idaho is generally more accessible for first-time gravel racers, factoring in distance, technicality, and logistical ease. Check each race's full profile for distance options and beginner-specific advice.
Colorado Trail Race takes place in August and Rebecca's Private Idaho in September. If your calendar allows, you could race both in the same season.
Colorado Trail Race is held in Durango to Denver, Colorado. Rebecca's Private Idaho is held in Ketchum, Idaho. Consider travel logistics, especially if you're flying in — check our full race profiles for airport and lodging details.
Get a personalized training plan for either race — tailored to your fitness, schedule, and goals.
$15/week, capped at $249. One-time payment.