Grand Raid des Pyrénées Tour du Bastan

GRP Tour du Bastan Finish Time Predictor

GRP Tour du Bastan race stats pre-loaded (53.3 km, 3,070 m D+). Enter a known race result to get an elevation-adjusted finish time estimate.

53.3km3,070m D+Winner: ~5h35Cutoff: 15h30

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

1. Your race

GRP Tour du Bastan

53.3 km · 3070 m D+ · 3929 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

84.0 km-effort (ITRA, gain only)103.6 km-effort

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

GRP Tour du Bastan finish times by UTMB Index

Predicted finish on the GRP Tour du Bastan course (53.3 km, 3,070 m D+) for each UTMB Index, with the margin to the 15h30 cutoff.

GRP Tour du Bastan: predicted finish time by UTMB Index
UTMB Index	Predicted finish	Average pace	Margin to cutoff
850	5h13	5:52 /km	+10h17
800	5h42	6:25 /km	+9h48
750	6h14	7:01 /km	+9h16
700competitive	6h49	7:40 /km	+8h41
650	7h27	8:23 /km	+8h03
600	8h08	9:10 /km	+7h22
550	8h54	10:01 /km	+6h36
500mid-pack	9h43	10:57 /km	+5h47
450	10h38	11:58 /km	+4h52
400back of the pack	11h37	13:05 /km	+3h53
350	12h42	14:18 /km	+2h48
300	13h53	15:38 /km	+1h37

The 15h30 cutoff sits at about Index 238. The typical winning time, 5h35, sits at about Index 812. At the 2026 edition, the median of the 793 finishers took 11h02, about Index 429. A model estimate, not an official ITRA or UTMB figure.

From a result you already have

What the predictor gives on GRP Tour du Bastan for a few common reference results.

GRP Tour du Bastan: predicted finish from reference results
Road marathon	3h00 → 9h01	3h30 → 10h31	4h00 → 12h01	4h30 → 13h32
50 km trail, 2,000 m D+	5h30 → 7h10	6h30 → 8h29	7h30 → 9h47	8h30 → 11h04

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

For arrival times at each checkpoint, use the GRP Tour du Bastan aid station planner.

GRP Tour du Bastan course in numbers

Climbing per km: 58 m
ITRA km-effort: 84 (50K)
Highest point: 2,509 m
Biggest climb: +628 m over 5.6 km at 11.2%
Steepest climb: +348 m over 1.3 km at 27.6% (from La Mongie)
Longest descent: -1,417 m over 11.9 km at 11.9% (down to Vielle-Aure (Finish))
Track climbing above 3%: 34%
Winning time / cutoff: 5h35 / 15h30 (2.8x the winner's time)

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

Predict your GRP Tour du Bastan finish time from a reference race result, adjusted for the course's 53.3 km and roughly 3,070 m of elevation gain. The overall cutoff is 15h30.

About Grand Raid des Pyrénées Tour du Bastan

Grand Raid des Pyrénées Tour du Bastan covers 53.3 km with around 3,070 m of elevation gain, starting in Pla d'Adet, Saint-Lary-Soulan, France. The overall cutoff is 15 hours 30 minutes.

Crew access is allowed at Restaurant Merlans (outbound) (8.8 km), La Mongie (24.6 km) and Restaurant Merlans (return) (39.9 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 du Bastan by the calibrated model behind the ITRA / UTMB Index Estimator. Full methodology.

Build a training plan targeted at your GRP Tour du Bastan goal time

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

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