Ultra Running Hub Silverton, Colorado, Colorado, United States · Friday, July 9, 2027
100 mi
Hardrock Hundred
280 days away
161 km Distance
10,058 m Climbing
10.0 Grit · Elite / extreme
What the course asks
Climbing rate 62 m / km
Mountain. Significant climbing. Steep sections will require power hiking.
Time limit 48 hours
17:53 min/km average. Generous. Walkable throughout for most of the field. Among the most forgiving 100 mi cut-offs we track. Measured against 41 races of the same distance. Cut-off calculator →
Typical conditions, July
Daytime high 21°C
Night low 6°C
Rainfall Mostly dry
Daylight 14 h 39 m of light
Regional 2001-2020 average for July — NASA POWER, grid elevation 3222 m. Not a forecast.
Course notes
- terrain This is a mountain course. Poles are highly recommended for the sustained climbs.
- gear With mountain terrain, choose a shoe with aggressive lugs (5mm+) for optimal performance.
- nutrition For 100km+ efforts, prioritize real food at aid stations to prevent palate fatigue.
Gear for this race
Chosen for 161 km of mountain with 10,058 m of ascent.
- Trail Running Shoes 62 m of climb per kilometre — grip and rock protection before cushioning.
- Race Nutrition Past 161 km the palate quits before the legs do — carry more than one flavour.
- Hydration Vests Pole attachment and chest-strap stability on steep ground.
- Trekking Poles 10,058 m of ascent to walk up.
- Headlamps A 48 h limit puts you out there after dark.
About
One of the toughest mountain ultras, running through the San Juan Mountains with an average elevation of 11,000ft.
Highlights
- Average 11,000ft elevation
- Snow crossings
- Touching the Hardrock