Blue Sky Marathon
Race Day Weather
Cool start, warming trend ahead
Runners will face a temperature range starting at 41°F and peaking at 67°F, necessitating pace adjustments as conditions warm. Wind will shift from a crosswind to a tailwind at critical segments, particularly beneficial from miles 20 to 26. With a maximum wind of 8 mph, hydration should be prioritized, especially during the climbs from miles 2 to 4 and 21. The humidity is manageable at 39%, so no extreme heat protocols are required.
Pace Calculator
Get forecast alerts for Blue Sky Marathon
We'll text or email you when the forecast shifts — so you can adjust gear, pacing, and strategy. Max one per day.
Race Info
The Blue Sky Marathon in Fort Collins, Colorado, offers runners a challenging 26.2-mile course through the picturesque Front Range mountains. Starting at the Blue Sky Trailhead in Horsetooth Mountain Park, the route features approximately 3,500 feet of elevation gain and loss, traversing a variety of terrains including smooth dirt trails, technical rock gardens, and distinctive redstone hardpack. With generous time allowances and a supportive community, this race caters to both seasoned trail runners and those new to the sport.