Collado de Frailes

Overview

Collado de Frailes is a 9.5 km category 2 ascent in Spain, climbing from a base at 867 m to a summit of 1318 m. That makes for 451 m of net elevation gain, with the ground rolling enough that your total ascent comes to 427 m — a hint that the climb is not one relentless wall but a stepped effort with the odd breather where the road eases or even tips slightly downhill.

At an average gradient of 4.75%, Frailes sits in the sustainable-but-honest range. It never becomes a leg-snapping grind, yet with nearly ten kilometres of steady uphill it demands respect. The category 2 label is well earned: harder than a 3 or 4, but a rung below the true monsters of category 1 and hors catégorie.

How the Gradient Unfolds

The headline numbers tell a coherent story. Over 9.5 km the road gains 451 m net, so the "average" 4.75% is exactly what you feel most of the way up. The gap between 451 m of net gain and 427 m of total ascent is small, which means the climb is fairly linear — there is little wasted descending mixed in, just a mostly continuous drag upward.

The steepest recorded pitch is 7.4%, comfortably under double the average. That matters: a climb where the maximum is only a little above the mean is one you can settle into. Expect the gradient to hover around the mid-single digits for long stretches, stiffening toward that 7.4% figure on a handful of ramps rather than dropping a sudden, punishing gauntlet in front of you.

Pacing Notes

Because the profile is even, Frailes rewards a metered, threshold-adjacent effort rather than surges. The climb is long enough — roughly ten kilometres — that going out too hard in the opening slopes will cost you dearly before the 1318 m summit.

Aim to ride the bulk of the climb just under your FTP, leaving headroom for the 7.4% ramps where you'll naturally drift upward in power. If you don't know your threshold, run your recent numbers through the FTP estimator first so you can set a realistic target wattage. On a 4.75% average, small pacing errors compound over 9.5 km, so err toward patience early and spend what's left on the steeper upper sections.

Gearing

For a category 2 climb of this length at 4.75%, most riders will be comfortable on a compact setup. A 34×32 lowest gear is plenty for the average slopes and will spin cleanly through the 7.4% pinches without forcing you out of the saddle.

If you're carrying fatigue, riding at altitude near 1318 m, or simply prefer to keep your cadence high, size up to a 34×34. That extra sprocket gives you a genuine bail-out gear for the steepest ramps and lets you protect your legs over the full 9.5 km. Neither choice is wrong here — the climb's moderate maximum means gearing is about comfort and consistency, not survival.

Summary

Collado de Frailes is an approachable but substantial category 2 climb: long, steady, and evenly graded, with a summit high enough to make the air thin without ever becoming brutally steep. Pace it near threshold, gear for comfort, and it becomes a satisfying rhythm climb from bottom to top.

Length: 9.5 km
Average gradient: 4.75%
Max gradient: 7.4%
Start: 867 m
Summit: 1318 m
Net gain: 451 m
Total ascent: 427 m
Category: 2