Istria 110K Aid Station Planner
All 9 Istria 110K checkpoints pre-loaded. Enter your goal finish time to get estimated arrival times at every aid station.
Full Istria 100 by UTMB - 110K course data: aid stations, cutoffs, course profile
Enter a goal Istria 110K finish time and get estimated arrival times at every checkpoint - 111 km with around 4,200 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 (9)
Cutoff Sat 10:00
Cutoff Sat 13:00
Cutoff Sat 17:00
Cutoff Sat 21:00
Cutoff Sun 01:00
Cutoff Sun 05:00
Cutoff Sun 07:00
Cutoff Sun 11:00
Istria 110K
Goal 18:30 · Start Sat 07:00
- Crew may meet you at
- Buzet 41.9 km, by Sat 14:21
- Livade 74.1 km, by Sat 20:13
- Drop bags
- Buzet 41.9 km, by Sat 14:21
| 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 | Sat 07:00 | - | - | - | - | - |
| Prapoće | 14.8 | +724 | 23.4 | 2:28:54 | Sat 09:28 | Sat 10:00 | 31 min | Sat 10:48Set by Trstenik | 2:28:54 | 10:04 |
| Trstenik | 26.5 | +662 | 20.6 | 4:39:57 | Sat 11:39 | Sat 13:00 | 1h20 | Sat 14:18Set by Buzet | 2:11:03 | 11:14 |
| Buzet | 41.9 | +440 | 25.3 | 7:21:05 | Sat 14:21 | Sat 17:00 | 2h39 | Sat 17:53Set by Butoniga | 2:41:08 | 10:25 |
| Butoniga | 58.6 | +826 | 29.3 | 10:27:29 | Sat 17:27 | Sat 21:00 | 3h33 | Sat 22:14Set by Livade | 3:06:24 | 11:10 |
| Livade | 74.1 | +692 | 26.0 | 13:13:08 | Sat 20:13 | Sun 01:00 | 4h47 | Sun 02:19Set by Grožnjan | 2:45:39 | 10:41 |
| Grožnjan | 89.9 | +729 | 25.2 | 15:53:39 | Sat 22:53 | Sun 05:00 | 6h06 | Sun 06:07Set by Buje | 2:40:31 | 10:13 |
| Buje | 96.8 | +37 | 8.2 | 16:45:59 | Sat 23:45 | Sun 07:00 | 7h14 | Sun 09:15Set by Umag (Finish) | 0:52:20 | 7:31 |
| Umag (Finish) | 111.0 | +90 | 16.3 | 18:30:00 | Sun 01:30 | Sun 11:00 | 9h30 | - | 1:44:01 | 7:20 |
Prapoće
Sat 09:28Cutoff Sat 10:0031 minTight
Leave by Sat 10:48Set by Trstenik
- Dist (km)
- 14.8
- D+ (m)
- +724
- Seg time
- 2:28:54
- Seg pace/km
- 10:04
Trstenik
Sat 11:39Cutoff Sat 13:001h20
Leave by Sat 14:18Set by Buzet
- Dist (km)
- 26.5
- D+ (m)
- +662
- Seg time
- 2:11:03
- Seg pace/km
- 11:14
Buzet
Sat 14:21Cutoff Sat 17:002h39
Leave by Sat 17:53Set by Butoniga
- Dist (km)
- 41.9
- D+ (m)
- +440
- Seg time
- 2:41:08
- Seg pace/km
- 10:25
Butoniga
Sat 17:27Cutoff Sat 21:003h33
Leave by Sat 22:14Set by Livade
- Dist (km)
- 58.6
- D+ (m)
- +826
- Seg time
- 3:06:24
- Seg pace/km
- 11:10
Livade
Sat 20:13Cutoff Sun 01:004h47
Leave by Sun 02:19Set by Grožnjan
- Dist (km)
- 74.1
- D+ (m)
- +692
- Seg time
- 2:45:39
- Seg pace/km
- 10:41
Grožnjan
Sat 22:53Cutoff Sun 05:006h06
Leave by Sun 06:07Set by Buje
- Dist (km)
- 89.9
- D+ (m)
- +729
- Seg time
- 2:40:31
- Seg pace/km
- 10:13
Buje
Sat 23:45Cutoff Sun 07:007h14
Leave by Sun 09:15Set by Umag (Finish)
- Dist (km)
- 96.8
- D+ (m)
- +37
- Seg time
- 0:52:20
- Seg pace/km
- 7:31
Umag (Finish)
Sun 01:30Cutoff Sun 11:009h30
- Dist (km)
- 111.0
- D+ (m)
- +90
- Seg time
- 1:44:01
- Seg pace/km
- 7:20
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. This is a budget, not a forecast: it assumes the same effort pace from start to finish, and in long races most finishers slow as the race goes on, so expect to be ahead of these times early and behind them late.
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
Istria 110K course in numbers
- Climbing per km
- 38 m
- ITRA km-effort
- 153 (100K)
- Highest point
- 1,017 m
- Biggest climb
- +639 m over 10.4 km at 5.8%
- Steepest climb
- +389 m over 2.8 km at 13.6%
- Longest descent
- -264 m over 13.4 km at 1.6% (Buje to Umag (Finish))
- Track climbing above 3%
- 33%
- Winning time / cutoff
- 9h27 / 28h00 (3x the winner's time)
Section-by-section climbs, descents and grades are on the Istria 110K course page.
About Istria 100 by UTMB - 110K
Istria 100 by UTMB - 110K covers 111 km with around 4,200 m of elevation gain, starting in Buzet, Croatia. The overall cutoff is 28 hours.
Crew access is allowed at Buzet (41.93 km) and Livade (74.14 km). Drop bags are available at Buzet.
Checkpoint data approximate - verify against the current official race guide at istria.utmb.world before your race.
How the splits are allocated
Your goal time is split across the Istria 110K legs by km-effort: distance + gain/100 + loss/200. Full methodology.
Track your Istria 110K plan, crew notes, and live progress in the app
TrailMath uses these models to build periodized plans adjusted to your goals and terrain.
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