SDT 138K Aid Station Planner
All 14 SDT 138K checkpoints pre-loaded. Enter your goal finish time to get estimated arrival times at every aid station.
Full Mallorca by UTMB - SDT 138K course data: aid stations, cutoffs, course profile
Enter a goal SDT 138K finish time and get estimated arrival times at every checkpoint - 138 km with around 5,350 m of climbing, with crew and drop-bag points flagged.
Turns every arrival into a clock time and every cutoff into a margin.
Terrain changes how the goal time is shared between segments, not the total. One surface everywhere cancels out.
Checkpoints (14)
Cutoff Sat 00:15
Cutoff Sat 02:20
Cutoff Sat 04:30
Cutoff Sat 07:40
Cutoff Sat 09:30
Cutoff Sat 11:40
Cutoff Sat 13:30
Cutoff Sat 16:00
Cutoff Sat 18:20
Cutoff Sat 22:30
Cutoff Sun 01:15
Cutoff Sun 03:00
Cutoff Sun 04:30
SDT 138K
Goal 24:31 · Start Fri 22:00
- Crew may meet you at
- Alaró 60.3 km, by Sat 08:50
- Lluc 96.6 km, by Sat 15:18
- Drop bags
- Alaró 60.3 km, by Sat 08:50
- Lluc 96.6 km, by Sat 15:18
| Checkpoint | Dist (km) | D+ (m) | Km-effort | Arrive by | Clock | Cutoff | Buffer | Leave by | Seg time | Seg pace/km |
|---|---|---|---|---|---|---|---|---|---|---|
| Start | 0 | 0 | - | 0:00:00 | Fri 22:00 | - | - | - | - | - |
| Esporles | 14.2 | +560 | 21.5 | 2:24:57 | Sat 00:24 | Sat 00:15 | -10 min | Sat 00:06Set by Valldemossa | 2:24:57 | 10:14 |
| Valldemossalikely hiking (pace) | 24.9 | +670 | 19.9 | 4:38:48 | Sat 02:38 | Sat 02:20 | -19 min | Sat 02:36Set by Bunyola | 2:13:51 | 12:31 |
| Bunyola | 38.0 | +181 | 16.9 | 6:32:42 | Sat 04:32 | Sat 04:30 | -3 min | Sat 04:51Set by Orient | 1:53:54 | 8:41 |
| Orient | 52.5 | +793 | 24.9 | 9:20:50 | Sat 07:20 | Sat 07:40 | 19 min | Sat 08:00Set by Alaró | 2:48:08 | 11:36 |
| Alaró | 60.3 | +278 | 13.3 | 10:50:41 | Sat 08:50 | Sat 09:30 | 39 min | Sat 10:03Set by Tossals Verds | 1:29:51 | 11:28 |
| Tossals Verds | 69.9 | +422 | 14.3 | 12:27:24 | Sat 10:27 | Sat 11:40 | 1h13 | Sat 12:12Set by Can Bajoca | 1:36:43 | 10:08 |
| Can Bajoca | 77.3 | +181 | 11.6 | 13:45:19 | Sat 11:45 | Sat 13:30 | 1h45 | Sat 14:05Set by Son Amer | 1:17:55 | 10:31 |
| Son Amerlikely hiking (pace) | 86.8 | +594 | 17.0 | 15:39:59 | Sat 13:39 | Sat 16:00 | 2h20 | Sat 16:41Set by Lluc | 1:54:41 | 12:01 |
| Lluc | 96.6 | +308 | 14.6 | 17:18:26 | Sat 15:18 | Sat 18:20 | 3h02 | Sat 19:32Set by Cúber | 1:38:26 | 10:06 |
| Cúberlikely hiking (pace) | 111.3 | +868 | 26.4 | 20:16:02 | Sat 18:16 | Sat 22:30 | 4h14 | Sat 23:07Set by Fornalutx | 2:57:36 | 12:05 |
| Fornalutx | 123.5 | +240 | 18.9 | 22:23:43 | Sat 20:23 | Sun 01:15 | 4h51 | Sun 01:43Set by Sóller | 2:07:41 | 10:23 |
| Sóller | 131.4 | +186 | 11.3 | 23:39:45 | Sat 21:39 | Sun 03:00 | 5h20 | Sun 03:38Set by Port de Sóller (Finish) | 1:16:02 | 9:43 |
| Port de Sóller (Finish) | 138.0 | +69 | 7.6 | 24:31:00 | Sat 22:31 | Sun 04:30 | 5h59 | - | 0:51:15 | 7:45 |
Esporles
Sat 00:24Cutoff Sat 00:15-10 minBehind cutoff
Leave by Sat 00:06Set by Valldemossa
- Dist (km)
- 14.2
- D+ (m)
- +560
- Seg time
- 2:24:57
- Seg pace/km
- 10:14
Valldemossalikely hiking (pace)
Sat 02:38Cutoff Sat 02:20-19 minBehind cutoff
Leave by Sat 02:36Set by Bunyola
- Dist (km)
- 24.9
- D+ (m)
- +670
- Seg time
- 2:13:51
- Seg pace/km
- 12:31
Bunyola
Sat 04:32Cutoff Sat 04:30-3 minBehind cutoff
Leave by Sat 04:51Set by Orient
- Dist (km)
- 38.0
- D+ (m)
- +181
- Seg time
- 1:53:54
- Seg pace/km
- 8:41
Orient
Sat 07:20Cutoff Sat 07:4019 minTight
Leave by Sat 08:00Set by Alaró
- Dist (km)
- 52.5
- D+ (m)
- +793
- Seg time
- 2:48:08
- Seg pace/km
- 11:36
Alaró
Sat 08:50Cutoff Sat 09:3039 minTight
Leave by Sat 10:03Set by Tossals Verds
- Dist (km)
- 60.3
- D+ (m)
- +278
- Seg time
- 1:29:51
- Seg pace/km
- 11:28
Tossals Verds
Sat 10:27Cutoff Sat 11:401h13Tight
Leave by Sat 12:12Set by Can Bajoca
- Dist (km)
- 69.9
- D+ (m)
- +422
- Seg time
- 1:36:43
- Seg pace/km
- 10:08
Can Bajoca
Sat 11:45Cutoff Sat 13:301h45
Leave by Sat 14:05Set by Son Amer
- Dist (km)
- 77.3
- D+ (m)
- +181
- Seg time
- 1:17:55
- Seg pace/km
- 10:31
Son Amerlikely hiking (pace)
Sat 13:39Cutoff Sat 16:002h20
Leave by Sat 16:41Set by Lluc
- Dist (km)
- 86.8
- D+ (m)
- +594
- Seg time
- 1:54:41
- Seg pace/km
- 12:01
Lluc
Sat 15:18Cutoff Sat 18:203h02
Leave by Sat 19:32Set by Cúber
- Dist (km)
- 96.6
- D+ (m)
- +308
- Seg time
- 1:38:26
- Seg pace/km
- 10:06
Cúberlikely hiking (pace)
Sat 18:16Cutoff Sat 22:304h14
Leave by Sat 23:07Set by Fornalutx
- Dist (km)
- 111.3
- D+ (m)
- +868
- Seg time
- 2:57:36
- Seg pace/km
- 12:05
Fornalutx
Sat 20:23Cutoff Sun 01:154h51
Leave by Sun 01:43Set by Sóller
- Dist (km)
- 123.5
- D+ (m)
- +240
- Seg time
- 2:07:41
- Seg pace/km
- 10:23
Sóller
Sat 21:39Cutoff Sun 03:005h20
Leave by Sun 03:38Set by Port de Sóller (Finish)
- Dist (km)
- 131.4
- D+ (m)
- +186
- Seg time
- 1:16:02
- Seg pace/km
- 9:43
Port de Sóller (Finish)
Sat 22:31Cutoff Sun 04:305h59
- Dist (km)
- 138.0
- D+ (m)
- +69
- Seg time
- 0:51:15
- Seg pace/km
- 7:45
Highlighted rows use a pace heuristic (>12 min/km / >19 min/mi) - likely hiking by speed, not grade. The grade-based power-hike cue is ≥15% (see GAP and Incline tools). Times are distributed proportionally by km-effort.
Leave by is the latest you can start the next segment and still make every cutoff ahead of you at this pace - often set by a station further on, not this one. It does not yet subtract the time you spend stopped, so treat it as the optimistic edge.
Cutoff buffers are estimates from your goal time and published barriers. Courses and barriers change - verify against the official race guide.
Next step
About Mallorca by UTMB - SDT 138K
Mallorca by UTMB - SDT 138K covers 138 km with around 5,350 m of elevation gain, starting in Estellencs, Spain. The overall cutoff is 30 hours 30 minutes.
Crew access is allowed at Alaró (60.31 km) and Lluc (96.56 km). Drop bags are available at Alaró and Lluc.
Checkpoint data approximate - verify against the current official race guide at mallorca.utmb.world before your race.
The science behind km-effort pacing
Most runners build race pacing plans by dividing total distance evenly - which ignores the fact that an uphill kilometre takes far longer than a flat one. This planner uses TrailMath's enhanced km-effort model to distribute your goal time proportionally by effort, not by distance.
The km-effort formula for each segment is: distance_km + gain_m/100 + loss_m/200. This is TrailMath's extension of the standard ITRA gain-only formula (model TM1, where the descent divisor is a published convention), which adds descent cost because steep technical descents carry real eccentric load. A 5km segment with 500m of gain and 200m of loss has an effort of 5 + 5 + 1 = 11 effort-km - equivalent to running 11km flat. Time is allocated proportionally to this effort score.
Why gain and loss have asymmetric costs. Minetti et al. (2002) mapped the metabolic cost of inclined locomotion across gradients from -45% to +45%. The key findings: metabolic cost rises steeply above 15-20% uphill grade, making power hiking more energy-efficient than running on steep climbs. On descents, eccentric muscle loading (quads acting as brakes) creates its own metabolic cost - steep technical descents are far more demanding than the same gradient on a smooth fire road. The gain/100 + loss/200 asymmetry in the formula reflects this - gain is more costly per metre than loss, but loss is not free.
Power hiking threshold is flagged at segments where your computed pace exceeds 12 min/km (19 min/mile). This threshold corresponds to the crossover point where walking biomechanics become more efficient than running on steep uphill terrain. Strategic power hiking on marked segments preserves leg muscle for descents and reduces overall race time compared to running everything.
This km-effort model is the same formula used in TrailMath's training engine for load calculation (following Dan Johnston's asymmetric elevation scoring methodology), ensuring consistency between how your training load is measured and how your race effort is planned.
Minetti AE et al. (2002). Energy cost of walking and running at extreme uphill and downhill slopes. J Appl Physiol. 93(3):1039-46. Minetti AE et al. (1995). Mechanical determinants of gradient walking energetics in man. J Physiol. 481(Pt 1):235-43. ITRA. km-effort formula. International Trail Running Association. itra.run
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