Oh Meu Deus by UTMB
Oh Meu Deus by UTMB (100M)
Lousã → Seia
Race guide
Updated 1 July 2026
Oh Meu Deus by UTMB is a 167 km point-to-point through the Portuguese mountains, running from Lousã (175 m) to Seia (507 m) with a single finish cut-off of Day3 13:00. The numbers tell you what kind of race this is: 7965 m of climbing over 167 km, and a high point of 1989 m — a relentless up-and-down profile rather than a handful of big passes, meaning the terrain never really lets you settle into flat rhythm for long.
The Course: Lousã to Seia
This is a linear crossing, not a loop — you start at 175 m in Lousã and finish at 507 m in Seia, but the net elevation change of just over 300 m hides the real story: 7965 m of accumulated climbing packed into the 167 km between them. That works out to roughly 48 m of vertical gain for every kilometre, which puts this firmly in the category of races where terrain, not flat speed, dictates your finishing time. Expect a course built from repeated climbs and descents through mountain terrain rather than one or two headline ascents, so the challenge is cumulative rather than concentrated in a single crux section. With the high point sitting at 1989 m, the route does touch proper altitude at some stage, and runners should expect the terrain and conditions up there to feel noticeably different from the valley sections near Lousã and Seia. Given the total distance and vertical gain, this is a race that rewards runners who have specific experience with long, sustained mountain climbing and descending, not just raw ultra mileage on rolling terrain.
Where the Race Is Decided
Because the checkpoint data here only confirms the start in Lousã and the finish in Seia with its Day3 13:00 cut-off, the practical takeaway is that this is a long day (or two) out with limited official reference points to pace against mid-race — you need to manage your own effort rather than chase intermediate splits. Community insight from runners who've done well here is consistent: the early kilometres feel deceptively easy and invite you to push, but that's exactly the trap. Going out patient — even conversational — in the first half isn't losing time, it's making a deposit that funds a much stronger finish. The pattern that's worked: treat the first half almost socially, hold back even when the legs say you can go harder, and trust that the climbing and cumulative fatigue in the second half will separate the field. Runners who tried to bank time early on the easier-feeling terrain consistently paid for it later, while those who stayed disciplined found they had far more left to work with when it mattered, in the closing stages toward Seia.
Pacing and Fuelling the Distance
With 7965 m of D+ over 167 km and a single hard cut-off at the finish (Day3 13:00), your pacing strategy has to be built around managing effort over multiple days, not just managing a single long push. The winning approach reported by runners here is to under-cook the first half deliberately — resist the urge to run on feel through the early, easier-feeling terrain — and instead ration your energy so you can close strongly rather than survive. Break the second half into manageable chunks mentally rather than fixating on the total remaining distance or climbing; treat tough stretches as a series of small, planned resets rather than one overwhelming grind. Fuelling needs to match this same discipline — steady, consistent intake from the start rather than compensating later, since with this much vertical gain your body will be working hard for the vast majority of the 167 km, not just on isolated climbs.
Conditions to Expect
Climbing to a high point of 1989 m from a starting elevation of just 175 m in Lousã means you'll move through a real range of mountain conditions over the course of the route, finishing down at 507 m in Seia. Runners should be prepared for the temperature and weather swings that come with that kind of elevation range across a multi-day effort, including the possibility of heat management becoming a real factor during lower-elevation stretches. The community insight about breaking tough sections into planned, managed resets rather than fearing them applies directly to heat and fatigue management here — treat difficult stretches as expected and plannable rather than as emergencies, and you'll handle the conditions far better than runners who try to grind through them at a constant effort.
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Checkpoints & cut-offs
✓ Course data verified against the official source (2026-07-05) · official source
0 km · 175 m · —
26.4 km · 523 m · Fri 23:00
46.3 km · 378 m · Sat 03:30
64.3 km · 748 m · Sat 08:00
86.5 km · 864 m · Sat 14:00
95.6 km · 572 m · Sat 16:30
111.5 km · 592 m · Sat 21:00
124.5 km · 749 m · Sat 01:00
133.3 km · 1895 m · Sun 04:30
144.3 km · 735 m · Sun 07:30
157.9 km · 706 m · Sun 11:30
167.8 km · 507 m · Sun 13:00
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