Hardrock cutoff calculator
Target finish to Cunningham, Ouray, Telluride, and Silverton. See where a 48-hour clock gets tight.
Exposure
Handies to Grouse
Weather turns buffer into survival margin.
48 hours
Long cutoff
Tightest gate is often mid-course, not the finish.
Train
Course DNA
Readiness for 33,000 ft of work.
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Hardrock
Tightest gate
Cunningham Gulch +2h 58m
Comfortable margin at the tightest checkpoint.
Checkpoint buffer
| Checkpoint | Mi | Arrival | Cutoff | Buffer |
|---|---|---|---|---|
| Cunningham Gulch | 9.1 | 2:01:41 | 5:00:00 | +2h 58m |
| Maggie Gulch | 15.6 | 3:39:43 | 8:30:00 | +4h 50m |
| Pole Creek | 19.7 | 4:45:46 | 10:30:00 | +5h 44m |
| Sherman | 28.7 | 7:12:08 | 14:00:00 | +6h 48m |
| Grouse Gulch | 42.2 | 10:24:18 | 20:30:00 | +10h 6m |
| Ouray | 56.6 | 13:40:17 | 27:00:00 | +13h 20m |
| Kroger's Canteen (Virginius) | 67.6 | 16:31:45 | 33:00:00 | +16h 28m |
| Telluride | 72.9 | 17:43:23 | 35:30:00 | +17h 47m |
| Chapman Gulch | 82.3 | 19:23:48 | 40:00:00 | +20h 36m |
| Putnam Basin | 91.7 | 21:57:36 | 44:00:00 | +22h 2m |
| Finish Silverton | 100.5 | 24:00:00 | 48:00:00 | +24h |
Selected course: Hardrock
Cutoff math is linear. The full aid station planner adds km-effort and hiking flags.