Grand Raid des Pyrénées Tour des Lacs

GRP Tour des Lacs Finish Time Predictor

GRP Tour des Lacs race stats pre-loaded (80.5 km, 5,187 m D+). Enter a known race result to get an elevation-adjusted finish time estimate.

80.5km5,187m D+Winner: ~10h04Cutoff: 25h

Full Grand Raid des Pyrénées Tour des Lacs course data: aid stations, cutoffs, course profile

1. Your race

GRP Tour des Lacs

80.5 km · 5187 m D+ · 5187 m D-

Different race?

Have the GPX? Measure the exact course in the GPX Explorer

2. How should we estimate you?

From my Strava historyYour last 90 days of real training. Opens the TrailMath app.Read-only access to your activities. Nothing is posted to Strava, and no training plan is created until you ask for one.

Distance (km)

Elevation gain (m)

Elevation loss (m)

Same as gain. Edit if different.

Finish time

Hours, or h:mm

3. Your predicted finish

132.4 km-effort (ITRA, gain only)158.3 km-effort

Add a past race or your index to get a finish time.

GRP Tour des Lacs finish times by UTMB Index

Predicted finish on the GRP Tour des Lacs course (80.5 km, 5,187 m D+) for each UTMB Index, with the margin to the 25h00 cutoff.

GRP Tour des Lacs: predicted finish time by UTMB Index
UTMB Index	Predicted finish	Average pace	Margin to cutoff
850	9h14	6:53 /km	+15h46
800	10h05	7:31 /km	+14h55
750	11h01	8:13 /km	+13h59
700competitive	12h03	8:59 /km	+12h57
650	13h10	9:49 /km	+11h50
600	14h24	10:44 /km	+10h36
550	15h44	11:44 /km	+9h16
500mid-pack	17h12	12:49 /km	+7h48
450	18h48	14:01 /km	+6h12
400back of the pack	20h33	15:19 /km	+4h27
350	22h28	16:45 /km	+2h32
300	24h34	18:18 /km	+0h26

The 25h00 cutoff sits at about Index 290. The typical winning time, 10h04, sits at about Index 801. At the 2026 edition, the median of the 1,046 finishers took 17h37, about Index 487. A model estimate, not an official ITRA or UTMB figure.

From a result you already have

What the predictor gives on GRP Tour des Lacs for a few common reference results.

GRP Tour des Lacs: predicted finish from reference results
Road marathon	3h00 → 15h09	3h30 → 17h40	4h00 → 20h12	4h30 → 22h43
50 km trail, 2,000 m D+	5h30 → 12h41	6h30 → 15h00	7h30 → 17h18	8h30 → 19h36

Road marathons use the tool's rougher power-law fallback.

For arrival times at each checkpoint, use the GRP Tour des Lacs aid station planner.

GRP Tour des Lacs course in numbers

Climbing per km: 64 m
ITRA km-effort: 132 (100K)
Highest point: 2,876 m
Biggest climb: +1,326 m over 8.0 km at 16.0% (through Col de Sencours (before Pic du Midi))
Steepest climb: +430 m over 1.5 km at 26.2%
Longest descent: -1,423 m over 11.7 km at 12.1% (down to Vielle-Aure (Finish))
Track climbing above 3%: 44%
Winning time / cutoff: 10h04 / 25h00 (2.5x the winner's time)

Section-by-section climbs, descents and grades are on the GRP Tour des Lacs course page.

Predict your GRP Tour des Lacs finish time from a reference race result, adjusted for the course's 80.5 km and roughly 5,187 m of elevation gain. The overall cutoff is 25h.

About Grand Raid des Pyrénées Tour des Lacs

Grand Raid des Pyrénées Tour des Lacs covers 80.5 km with around 5,187 m of elevation gain, starting in Vielle-Aure, Hautes-Pyrénées, France. The overall cutoff is 25 hours.

Crew access is allowed at Restaurant Merlans (outbound) (15.6 km), La Mongie (30.5 km), Tournaboup (50.9 km) and Restaurant Merlans (return) (67.4 km).

Checkpoint data approximate - verify against the current official race guide at grandraidpyrenees.com before your race.

How the prediction works

Your result becomes a UTMB Index, mapped onto GRP Tour des Lacs by the calibrated model behind the ITRA / UTMB Index Estimator. Full methodology.

Build a training plan targeted at your GRP Tour des Lacs goal time

TrailMath uses these models to build periodized plans adjusted to your goals and terrain.

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