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Widely regarded as the toughest 100-miler in the US: 100.5 miles and ~33,000ft of climbing entirely above 10,000ft in Colorado's San Juan Mountains, topping 14,048ft Handies Peak, 48h cutoff, finishers kiss the Hardrock. Date approximate (early-mid July).
Location
Silverton, Colorado (San Juan Mountains loop)
Widely regarded as the toughest 100-miler in the US, and every step of it sits above 10,000ft. 100.5 miles through Colorado's San Juan Mountains, one big loop from Silverton that never really comes down.
You're out for two nights on exposed alpine passes, with cold creek crossings, snowfields into July, and Colorado afternoon storms that can turn an exposed ridge deadly. Long committing legs between aid stations.
The 48-hour cutoff sounds generous, and it is, but altitude is the real gatekeeper. The thin air governs your pace, your appetite and your sleep. Finish, and you kiss the Hardrock.
Beina Insights
Data
slower than the winner was the median finisher, the field spreads out fast
covers the middle half of the field, where the bulk of finishers land
separates the first finisher from the last
Patterns like these, drawn straight from 2025 race data, are baked into how Beina coaches you for this event.
Who this suits
- Experienced mountain-ultra runners. You need a qualifier and a lottery place to toe the line, so you arrive with real 100-mile mountain miles already in the legs.
- Runners who can get to altitude. The race averages over 11,000ft, so weeks of acclimation or an altitude tent turns the thin air into an edge instead of the thing that ends your day.
- Patient power-hikers. Most of the passes are hiked, not run, and the day rewards a talkable, altitude-capped effort over early enthusiasm.
- Runners at home in remote high country. Long committing legs between aid demand self-reliance and sharp weather judgement, not just fitness.
Training plan
A training plan for Hardrock 100 isn't a generic base build. Beina reads the event's exact demands, looks at your specific profile and the time you actually have, and maps a highly adapted plan to the start line.
01 · Race demands
What Hardrock throws at you
- Sustained extreme altitude the whole way, high enough that pace, appetite and sleep all degrade if you arrive unadapted.
- As much steep descending as climbing across two days, a relentless eccentric load that shreds untrained quads.
- Two nights on course, freezing exposed ridges down to warm valleys, headtorch and layers non-negotiable.
- Afternoon lightning storms and lingering snowfields on the passes, where weather judgement is a survival skill.
02 · Key sessions
What your weeks look like
- Big-vert days: 5 to 8 hour mountain runs targeting 2,000 to 3,500m of climbing.
- Back-to-back weekends building toward an 8 hour day followed by a 5 hour day on tired legs.
- Dedicated downhill repeats and long descent finishes to bomb-proof the quads.
- Pole hike repeats, altitude exposure, night runs and full fuelling rehearsals in the specialise block.
03 · Shaped around you
Not a generic schedule
- Built from your current fitness and the time you actually have
- Adapts every week as Beina learns how you respond
- Syncs your sessions straight to Garmin and Wahoo
- One clear next session, never a wall of spreadsheet