Leitariegos Pass

Overview

Leitariegos Pass is a Category 2 climb in Spain that earns its rating through sustained length rather than relentless brutality. At 15.3 km with a 732 m net elevation gain and a 4.78% average gradient, it sits firmly in the "honest day's work" category — not a wall, but long enough to drain legs that haven't been managed with care.

The total ascent figure of 1,546 m against a net gain of 732 m is worth noting. That gap tells you the road isn't simply a straight ramp from base to summit; there are undulations along the way, meaning the actual climbing load is roughly double what the net numbers suggest. Riders who treat the easier sections as recovery rather than acceleration will arrive at the summit in far better shape.

Gradient Profile

The 4.78% average is mild enough to sustain a strong tempo on fresh legs, but the 17.88% maximum gradient is a different conversation entirely. A ramp of that severity can appear without much warning and will punish anyone who has been pushing too hard in the kilometres before it.

• Lower slopes: The start elevation of 778 m places the base in relatively low terrain. Expect the opening kilometres to feel manageable, which is precisely when most riders overcommit.
• Mid-climb undulations: The difference between total ascent and net gain confirms the road loses and regains height more than once. Use any descent or flat stretch to recover — resist the urge to push the pace.
• Upper ramps: The maximum gradient of 17.88% will appear somewhere on this road. Without a detailed kilometre-by-kilometre breakdown, treat any sustained steepening in the final third as a potential encounter with that figure.

Pacing Notes

With 15.3 km to cover, this is a climb where FTP-based pacing pays dividends. A rough target for a Category 2 effort is somewhere in the 85–95% FTP range for trained climbers, but that ceiling needs to drop meaningfully when the gradient spikes.

• Set your effort by power or perceived exertion at the base and resist the temptation to follow faster riders early on.
• The undulating nature of the route means heart rate will lag behind actual effort on the steeper pitches. Power or RPE are more reliable guides here.
• If you're unsure of your threshold, use the FTP estimator before planning your target watts for the day.

Gearing Recommendations

The 17.88% maximum gradient makes a compact chainset (50/34 or 46/30) with a wide-range cassette non-negotiable for most riders. A 34×32 or 34×34 combination will keep cadence manageable at the steepest points without forcing a grinding, seated lurch that costs more energy than it saves.

Riders on 1x drivetrains should confirm their low gear before attempting the climb. A 38T chainring paired with a 10-42T cassette will handle the gradients, but anything smaller at the back risks a very uncomfortable few minutes on that upper ramp.

Summary

Leitariegos Pass rewards patience. The 4.78% average invites a comfortable rhythm, but the 1,546 m of total ascent and the near-18% maximum gradient leave no room for a sloppy first half. Treat it as a 15 km time trial with a sting in the tail, gear conservatively, and bank energy through the undulating mid-section.