Frequently asked

• When is the best time of year to race mountain bikes in the Rocky Mountains?

  Mid-June through late September. Snow keeps the high passes closed until late June in most years, and the first big October storm typically closes the season above 9,000 feet. July and August are the busiest race months but bring afternoon thunderstorms; September is widely considered the best racing weather of the year.
• How much does altitude actually affect race performance on a bike?

  Significantly — and arguably more on the bike than on foot because power output is harder to ration. Above 7,000 feet expect 10–15% reduction in sustainable power for the first 3–5 days. Arrive a day early (race travel-fresh) or 7+ days early (acclimatize); the 3–4 day window is the worst-case scenario physiologically.
• Will my XC bike handle Rocky Mountain courses or do I need a trail bike?

  Most XC and marathon courses are rideable on a fast 100–120mm XC bike with 2.3–2.4" tires. Multi-stage events like Breck Epic and Pierre's Hole favor a slightly burlier 120–130mm trail bike given the descents. If a course description mentions "alpine doubletrack" or "Continental Divide singletrack," err toward more bike, not less.
• How dangerous are afternoon thunderstorms on exposed rides?

  Lightning above tree line is the real danger — multiple riders are struck across the range every year. Most well-organized races start early enough that the field is below 11,500 feet by 1pm. If you're slower than that, take the early start. Always carry a packable rain shell; even clear-morning rides can shift in 90 minutes.
• Which Rocky Mountain MTB races draw the strongest fields?

  Breck Epic (CO), Pierre's Hole (WY/ID), Crusher in the Tushar (UT, gravel-MTB hybrid), the Park City Point 2 Point, and Leadville Trail 100 MTB all attract national and international fields. Smaller community-run summer series in Salida, Crested Butte, and Bozeman draw strong regional pros and are excellent training events.