Marcos Highway

Overview

Marcos Highway is a Category 1 climb that packs serious punishment into just 7.9 km. From a start elevation of 867 m, the road claws its way up to a 1521 m summit, delivering 654 m of net elevation gain along the way. The average gradient of 8.24% tells you most of what you need to know: this is a sustained, steep effort with almost nowhere to recover. With 656 m of total ascent over the 7.9 km, there is precious little false-flat or descent to break up the workload — nearly every metre gained is a metre earned.

How the Gradient Unfolds

The number that defines this climb is 8.24%. That average is high enough that even the "easy" stretches feel like work, and the pitches around the 14.07% maximum are where legs start to buckle. Because total ascent (656 m) sits only 2 m above net gain (654 m), the profile is almost monotonically upward — there are essentially no downhill kickers to reset your rhythm or your heart rate.

Practically, that means the climb behaves like a single, unbroken wall rather than a series of distinct ramps. When the road tilts toward its 14.07% steepest section, expect your cadence to drop and your speed to fall away sharply. The smart move is to treat the whole 7.9 km as one continuous effort and save something for those steepest pitches rather than burning matches early on the more "manageable" 8% slopes.

Pacing Notes

On a climb this uniform, pacing is everything. Ride it at a steady, sustainable output rather than surging — the 8.24% average will punish anyone who goes out too hard in the first kilometres. A good target is to hold just below your threshold power for the full 7.9 km, leaving a small reserve for the 14.07% maximum ramp.

Anchor your effort to your FTP. If you don't have a recent number, use the FTP estimator to set a realistic ceiling before you start. Aim to climb at a percentage of FTP you can hold for the full duration, and let cadence — not ego — dictate your gear choices as the road steepens.

Gearing

With a 654 m gain crammed into 7.9 km and a 14.07% maximum, gearing matters more here than on gentler climbs. For most riders, a compact 34-tooth chainring paired with a wide cassette is the sensible baseline. A 34×32 will carry strong climbers through the sustained 8.24% grade, but for the steepest 14.07% pitch — or on tired legs late in a long ride — a 34×34 gives you the extra margin to keep spinning rather than grinding to a standstill. If you tend to climb seated and value cadence, err toward the 34×34.

Summary

Marcos Highway is a compact but genuinely hard Category 1 climb: 7.9 km of near-continuous ascent at 8.24%, with a 14.07% sting and 654 m of vertical to your name by the top. Pace it evenly, gear conservatively, and respect the steepest ramps.

Length: 7.9 km
Average gradient: 8.24%
Max gradient: 14.07%
Start: 867 m
Summit: 1521 m
Net gain: 654 m
Total ascent: 656 m
Category: 1