Blue Sky Marathon & Half: Header

Start: Blue Sky Trailhead, Horsetooth Mountain Park. Fort Collins, Colorado
Distance: 26.7 miles (3,500′) or 13.4 miles (1,800′)
Min/Max Elevation: 5,300′-6,500′
Average Elevation: 5,700′ Marathon
Terrain: Marathon: 22mi dirt singletrack, 3mi rocky singletrack, 2mi dirt road; Half Marathon: 13.0mi dirt singletrack, 0.5mi dirt road
Fauna: Deer, abert squirrel, golden eagle
Registration Cap: 400 Marathon / 400 Half
Time Allowance: 9 hours Marathon / 6 hours Half Marathon
Dates: October 18 (Marathon) / October 19 (Half Marathon), 2025