Puerto del Gamo

Overview

Puerto del Gamo is a Category 3 climb in Spain. It runs 5 km from a start elevation of 407 m to a summit at 648 m, for a net elevation gain of 241 m. On paper that is a short, mid-tier ascent: long enough to matter in a day's route, but not a summit that decides a ride on its own.

The number that changes how you read this climb is total ascent. While the net gain is 241 m, the road actually climbs 386 m over its length. That 145 m difference is re-climbing you pay for after every dip — descents and false flats that hand back altitude you then have to earn again. In practice you do noticeably more vertical work than the net figure suggests, and the effort feels punchier and more stop-start than a steady 5 km climb of the same net gain.

How the Gradient Unfolds

The 4.87% average is a poor guide to what your legs feel. Because 145 m of the climbing is re-gained after dips, the true ramps are steeper than the average implies, and they alternate with recovery. The steepest pitch hits 16.6%, more than three times the average — enough to spike your heart rate and force a gear you might not expect on a Cat 3.

• Flatter and downhill recovery sections where the road gives back altitude
• Repeated short climbs rather than one continuous grind
• A steepest ramp of 16.6% that demands your lowest gear

Pacing Notes

Do not chase even speed here. On an undulating profile, holding a constant speed means overcooking the steep ramps and coasting the flats — the worst of both. Aim instead for even effort: settle on a target sustainable power output and hold it through the pitches, letting your speed rise and fall with the gradient. Push a little into the steep sections without going deep into the red, and use the flatter and downhill stretches to recover rather than to attack. If you don't know your ceiling, run the FTP estimator beforehand so your target number is grounded rather than guessed.

Gearing

Gearing on Puerto del Gamo is governed by the steepest ramp, not the average. A 16.6% pitch will overwhelm a road-race setup if you tire early. Fit a compact (50/34) or sub-compact chainset and pair it with a wide-range cassette — 34×32 or 34×34 — so you always have a bailout gear for the steep sections. Check your setup before the ride: confirm the chain shifts cleanly into the largest sprocket and that your rear derailleur handles the full range. A skipped shift on a 16.6% ramp is where riders stall.

Summary

• Length: 5 km
• Average gradient: 4.87%
• Maximum gradient: 16.6%
• Net elevation gain: 241 m
• Total ascent: 386 m
• Category: 3

Puerto del Gamo rewards riders who read the total ascent, not just the net gain. Pace it on effort, gear for the 16.6% ramp, and the extra 145 m of hidden climbing becomes a rhythm you manage rather than a surprise that breaks you.