Coal Bank Pass

What to Expect on Coal Bank Pass

Coal Bank Pass is a Category 1 climb in the United States, and the numbers justify that rating without argument. The road ascends 8.4 km at an average gradient of 7.25%, gaining 609 m net elevation from base to summit. Total ascent comes in at 749 m — the gap between net gain and total ascent signals that the road dips and rolls in places, resetting your legs briefly before demanding more. Don't let those short recoveries fool you into burning matches you'll need later.

The climb starts at 2,664 m above sea level. That's already high — well into the elevation band where aerobic capacity degrades noticeably for athletes who haven't acclimatized. By the time you reach the summit at 3,273 m, the thin air compounds every percentage point of gradient. If you're traveling from sea level, factor in at least a few days of altitude adaptation before attempting a hard effort here.

How the Gradient Unfolds

The 7.25% average is honest, but averages on a climb with a 17.38% maximum gradient are always a partial truth. That peak ramp — nearly double the mean — appears somewhere along the upper road and constitutes the crux of the climb. A common mistake is arriving at it already in the red.

With a total ascent of 749 m against a net gain of 609 m, expect at least one or two genuine gradient breaks or brief descents embedded in the upper half. These are not rest stops; they're traps for athletes who surge out of them without resetting their power target.

Gradient character in broad terms:

• Lower section: sustained effort at or near the average — manageable but unrelenting
• Mid-section: watch for the terrain's rolling character; maintain rhythm rather than chasing speed on the flatter pitches
• Upper ramps: the 17.38% maximum lives here; if your legs are loaded, this will crack an unsustainable pace open

Pacing Notes

Coal Bank Pass rewards even-effort climbing, not even-speed climbing. Because gradient varies significantly — from moderate sustained ramps to a maximum near 17.4% — the correct approach is to set a power or FTP-based ceiling and hold to it regardless of what the road does.

For most trained riders, targeting 75–85% of FTP across the full 8.4 km is a workable band. Exceed that ceiling on the lower slopes and the 17% ramp near the top becomes an unmanageable wall. If you're unsure of your current FTP, use the FTP Estimator before planning your effort zones.

Altitude suppresses peak power output. Riders who know their sea-level FTP should apply a conservative discount — the exact amount depends on individual response to altitude, but the starting elevation of 2,664 m means the effect is real from the first pedal stroke.

Gearing

A compact or sub-compact chainring setup is strongly advisable. The 17.38% maximum gradient on a climb that begins at altitude, after already accumulating significant fatigue, is not a place to be under-geared. A 32 or 34-tooth small ring paired with an 11-32 or wider cassette gives you somewhere to hide on the worst pitches without sacrificing efficiency on the moderate middle sections.

If you're running a standard double, make sure your legs — and your ego — are ready for what the upper road asks. There is no shame in spinning; there is plenty of suffering in grinding a too-large gear into a 17% headwall at 3,000 m.

Summary

Coal Bank Pass is a legitimate Category 1 climb: 8.4 km, 7.25% average, 609 m of net elevation gain, a 17.38% maximum gradient, and a summit at 3,273 m. The altitude makes every number harder than it looks on paper. Pace conservatively from the bottom, keep gear selection honest, and reserve something for the upper pitches where the climb shows its real character.