Mallorca by UTMB
Mallorca by UTMB (Serra de Tramuntana 138K)
Estellencs (Cala Estellencs) → Port de Sóller
Race guide
Updated 29 June 2026
The Serra de Tramuntana 138K is Mallorca by UTMB's flagship distance, tracing 138 kilometres along the dramatic limestone spine of the Tramuntana range from Cala Estellencs in the southwest to Port de Sóller on the northern coast. With 5,085 m of climbing and a high point of 1,206 m, it is not a race defined by Himalayan elevation but by relentless, technical undulation — the Serra de Tramuntana rarely lets you settle into a rhythm before throwing another rocky climb at your legs. The route passes through two crew-accessible bag drop points at Alaró (67 km, 452 m) and Lluc (98 km, 651 m), and carries a Day 2 04:30 finish cut-off at Port de Sóller. What makes the 138K genuinely hard is the combination of cumulative terrain, Mediterranean heat, and the slow-burn fatigue that builds through the second half of a Mallorcan night — this is a race where the patient runner almost always outlasts the ambitious one.
Course & Terrain
From the coastal start at Cala Estellencs (21 m) the course immediately climbs into the limestone ridges that define the Serra de Tramuntana. The terrain is characteristically Mallorcan: narrow stone trails, ancient dry-stone walls, root-laced forest paths and exposed rocky ridgelines that demand constant foot placement attention. There is no flat section long enough to let you switch off. The mid-race passage through Alaró at 67 km brings you down to 452 m before the course climbs back into the range, reaching the monastery at Lluc (651 m) at 98 km. The final 40 kilometres from Lluc to Port de Sóller (4 m) involve a sustained descent to sea level — but not before several more climbs that feel disproportionately cruel on tired legs. The high point of 1,206 m is reached somewhere in the range's interior, and while it is not alpine in scale, the technical limestone underfoot makes descending it slower and more costly than the altitude alone suggests.
The Decisive Climbs & Where the Race Is Won or Lost
The race is not won on any single climb — it is won between 70 km and 110 km, the stretch after Alaró and through to beyond Lluc. This is where the second night or deep fatigue of the first night begins to bite, where the terrain stays demanding and where runners who went out too hard through the first half start to unravel. The climbs out of Alaró and the rolling ridges approaching Lluc are the true crux. Runners who arrive at Lluc (98 km) with legs still under them and a fuelling strategy intact have every tool they need to finish strongly. Those who do not will suffer through the final 40 km to Port de Sóller regardless of what the profile shows. The high point of 1,206 m should be treated as a waypoint to reach economically, not a peak to chase — the goal is to cross it and the kilometres beyond it with reserves still in the tank.
How to Pace & Fuel It
The single most important pacing decision you make happens in the first two hours. Starting at Cala Estellencs, the early trail sections can feel inviting, and the temptation — especially if the morning is cool — is to bank time. Resist it completely. Fast starts are what break runners on this course; push from the gun, especially in any warmth, and cramps and a shattered second half are the likely result. Start conservatively, let your legs come online, and treat the first 67 km to Alaró as a deposit you are making against the back half. A patient, even social first half is not a tactical mistake — it is the foundation of a strong finish. Use Alaró at 67 km and Lluc at 98 km as structured resets: eat a real meal, change socks if needed, collect your drop bag items and mentally break the race into segments. The closer's gear — genuine pushing — belongs in the kilometres after Lluc, when the field is tired and you are not.
Conditions to Expect
The Serra de Tramuntana is a Mediterranean mountain range, and the race conditions reflect that. Depending on the time of year, heat is the most common performance-wrecking variable on this course. Mallorcan sun at lower elevations and in exposed valleys can push temperatures into territory where sweat rate dramatically outpaces most runners' fluid plans. The counter-strategy is deliberate and aggressive: plan your cooling at every checkpoint — cold water over the head and neck, ice where available, wet clothing if the temperature demands it. Runners who build a proactive cooling routine into their checkpoint stops stay upright when the field around them deteriorates. Nights in the mountains can swing cool quickly, so carrying a mid layer is non-negotiable. The limestone terrain also holds heat in the afternoon and becomes slippery when wet, so traction-focused trail shoes with good grip on technical rock are essential. Check the forecast carefully in the days before the race and adjust your fluid and salt strategy accordingly — heat on this course is manageable, but only if you treat it as a variable to plan around, not react to.
Race Mallorca by UTMB (Serra de Tramuntana 138K) with Crux
Get the strategy, fuelling and crew plan dialled for this exact course — built from the real route, climbs and cut-offs. Your first race is free.
Plan this race — freeCourse profile
Checkpoints & cut-offs
✓ Course data verified against the official source (2026-07-05) · official source
0 km · 21 m · —
14.1 km · 238 m · Sat 00:15
24.9 km · 410 m · Sat 02:20
38 km · 199 m · Sat 04:30
52.4 km · 487 m · Sat 07:40
60.3 km · 221 m · Sat 09:30
69.8 km · 527 m · Sat 11:40
77.2 km · 237 m · Sat 13:30
86.7 km · 527 m · Sat 16:00
96.6 km · 478 m · Sat 18:20
111.2 km · 754 m · Sat 22:30
123.4 km · 143 m · Sun 01:15
131.3 km · 11 m · Sun 03:00
138.4 km · 3 m · Sun 04:30
More races
More UTMB World Series
More in Spain
Similar distance (100 km–100 miles)
Racing Mallorca by UTMB (Serra de Tramuntana 138K)?
Get a complete race strategy — pacing, fuelling, crew plan and the crux moments — built on this exact course.
Plan your race in Crux →Strava is your training. Crux is your races.