A hidden gem in Colorado's Wet Mountains with outlaw history and dramatic ecosystem transitions
Mace's Hideout 100 Mile takes place on June 06, 2026 in Beulah, CO.
Mace's Hideout 100 Mile is 101 miles with 22,500 ft of elevation gain.
No — Mace's Hideout 100 Mile uses open registration; no lottery is required.
Yes, crew is allowed at Mace's Hideout 100 Mile. Sign in to Trailrace to see crew access for each aid station.
Yes, pacers are allowed at Mace's Hideout 100 Mile.
Yes, Mace's Hideout 100 Mile allows drop bags.
Mace's Hideout 100 Mile has 12 aid stations along the course.
The overall cutoff for Mace's Hideout 100 Mile is 36h. Per-aid-station cutoffs are available to signed-in Trailrace members.
Other trail races within 56 miles
A rugged 100-mile loop through Colorado's Wet Mountains, traversing dramatically different ecosystems from mossy fir forests on the wet eastern slopes to arid piñon and cactus country on the west side. The course uses a mix of singletrack trails, forest roads, and 4WD roads, climbing to nearly 11,700 feet before descending into the Wet Mountain Valley with views of the Sangre de Cristo Mountains and Spanish Peaks. Named after the 1860s outlaw Juan Mace, who used the valley's rugged terrain as his hideout.
Experienced ultrarunners
Beulah, CO, United StatesJune 06, 2026
Moderate trail conditions with some technical sections
| Location | Mile | Elevation |
|---|---|---|
Start Start | 0.0 | 6,663 ft |
AS#1 - San Isabel Aid Station | 9.8 | 8,215 ft |
AS#2 - Greenhorn Aid Station | 18.3 | 11,161 ft |
H2O Only Aid Station | 22.9 | 9,101 ft |
AS#3 - Pole Creek Aid Station | 29.8 | 8,520 ft |
AS#4 - Sand Hollow Aid Station | 37.7 | 7,900 ft |
AS#5 - Sand Hollow Aid Station | 45.9 | 7,900 ft |
AS#6 - Overlook Aid Station | 52.8 | 8,950 ft |
AS#7 - Overlook Aid Station | 55.8 | 8,950 ft |
AS#8 - Pole Creek Aid Station | 63.8 | 8,520 ft |
AS#9 - Greenhorn Aid Station | 70.2 | 11,161 ft |
AS#10 - Saint Charles Aid Station | 79.9 | 11,450 ft |
Unofficial AS - HWY 165 Crew Access | 84.5 | 10,243 ft |
AS#11 - Second Mace Aid Station | 90.8 | 8,547 ft |
Finish Finish | 101.0 | 6,663 ft |
Sign in to see cutoffs, crew access, drop bags, and services for every aid station.
Dogs must be on leash at all times, never left unattended, and not within close proximity of aid station tents. Barking or aggressive dogs may result in runner DQ.
Car camping allowed at Pueblo Mountain Park start/finish for $25. No campers, RVs, or tents. Must stay in the main area between the Horseshoe Lodge and the Pavilion.
Early June in the Wet Mountains brings warm days at lower elevations (70-90°F) with significantly cooler temperatures at altitude and overnight (30-50°F). Afternoon thunderstorms are common in the mountains. The west side of the range is notably hotter and drier with intense sun exposure, while the east side is cooler and more sheltered. Snow is possible above 11,000 ft.
Course averages over 9,000 ft with a high point of 11,659 ft
Afternoon thunderstorms common in June in the Colorado mountains
Nighttime temps can drop below freezing at altitude
West side of the range is arid with intense sun exposure; daytime temps can reach 90°F at lower elevations
Dramatic microclimate shifts between wet eastern slopes and dry western slopes
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