Istria 100 by UTMB - 42K - Elevation Profile, Aid Stations and Cutoffs
- Motovun, Croatia
- 42 km
- 1,000 m D+
- 3 aid stations
Map, checkpoints and cutoffs Map · checkpoints · forecast opens Mar 25 Race-day forecast is live
Race-day conditions
Weather, daylight and your arrival time at all 5 checkpoints, set to the 12:00 start.
- Start
- 12:00
- Daylight at the start
- 06:42-19:34
- Aid stations
- 3
Course profile
Motovun, Croatia Umag, Croatia · point-to-point
- Distance
- 42 km Finishes 153 m lower than it starts
- Elevation
- +1,000 m -1,153 m About 24 m of climb per km
- Highest point
- 380 m Ridge between Livade and Grožnjan
Next edition Sat 3 Apr 2027 · 12:00
- Start
- Winner ~2h51 2h51 after the start
- Median finisher 2026 median 5h44 after the start
- Sunset Umag, Croatia 7h36 after the start
- Cutoff 8h after the start
Istria 100 by UTMB - 42K is a 42 km ultra-trail with around 1,000 m of elevation gain, starting in Motovun, Croatia. The overall cutoff is 8 hours. The highest point on the course is Ridge between Livade and Grožnjan at 380 m. That is 24 m of climbing per kilometre. Istria 100 by UTMB has 4 races, from 42 to 168 km; this one ranks 4 of 4 by distance and 4 of 4 by climbing per kilometre.
The biggest climb between checkpoints gains around 696 m from Livade (km 5.14) to Grožnjan (km 20.86). The steepest sustained section on the elevation profile averages about 15% over roughly 2.3 km around km 7. The published checkpoint list has no crew-access points - check the official runner guide for assistance rules.
Data is approximate and courses change between editions - always verify against the official race guide.
Other distances at Istria 100 by UTMB
| Race | Distance | D+ | Cutoff | Next start |
|---|---|---|---|---|
| Istria 168K | 168 km | 6,800 m | 45h00 | Apr 2, 2027 |
| Istria 110K | 111 km | 4,200 m | 28h00 | Apr 3, 2027 |
| Istria 69K | 69.6 km | 2,400 m | 15h00 | Apr 3, 2027 |
| Istria 42K (this page) | 42 km | 1,000 m | 8h00 | Apr 3, 2027 |
Plan against the cutoffs
Enter a goal finish time and see estimated arrivals vs checkpoint cutoffs.
Estimate your finish
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Course math
Four numbers worked out from this course's distance, elevation and checkpoints.
TrailMath effort-km
58 effort-km
About 5 h for a mid-pack finisher (index 500). Not a pacing guarantee.
Distance + gain ÷ 100 + loss ÷ 200, beside ITRA's gain-only km-effort. Model TM1.0.
How TrailMath works →UTMB Index category
50K
52 km-effort (distance + gain ÷ 100). Calculated from the course figures, not an official classification.
Estimate your UTMB Index → ITRA and UTMB indexes explainedBiggest climb section
+696 m
Livade → Grožnjan · km 5.1–20.9
The largest gain between two checkpoints, not one continuous climb.
Livade cutoff: Sat 13:00
Biggest descent section
−435 m
Livade → Grožnjan · km 5.1–20.9
The largest loss between two checkpoints. ITRA's km-effort ignores descent; TrailMath counts it: 58 km-effort.
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Istria 100 by UTMB - 42K · 2026
Finish times, 2026 edition
673 runners started. 644 came back. Half of them took longer than 5:43:40. That left the median finisher 2:16:20 inside the 8h cutoff.
Median finish
5:43:40
Half of the 644 finishers were still out there at this point.
2:16:20 in hand before the 8h cutoff
Average 5:43:29, 0:00:11 quicker than the median: a fast front pulls it down.
The start line
95.7%
644 of 673 starters made it; 29 did not.
still moving when a cutoff closed
stopped by choice or by the medics
Men and women
Two medians on the same scale. The bars run from the start to the cutoff, so the gap between them is the gap in time.
Men
5:33:40
median finish; average 5:36:25
438 finishers, 68% of the field
Women
5:59:43
median finish; average 5:58:31
206 finishers, 32% of the field
0:26:03 separates the two medians, across 438 men and 206 women.
Finish time by age group
Every track runs from the start to the 8h cutoff, so the empty part of a bar is the time that group's median finisher still had. Men and women are drawn on the same scale.
| Age | Median finish | Median against the cutoff | Finishers |
|---|---|---|---|
| 18-19 | - | 1 - too few finishers to publish a time | |
| 20-34 | 5:21:02 | 115 | |
| 35-39 | 5:24:56 | 79 | |
| 40-44 | 5:27:52 | 78 | |
| 45-49 | 5:34:40 | 61 | |
| 50-54 | 5:41:34 | 56 | |
| 55-59 | 6:06:22 | 29 | |
| 60-64 | 6:35:31 | 14 - small sample, read with care | |
| 65-69 | 5:28:55 | 4 - small sample, read with care | |
| 70-74 | - | 1 - too few finishers to publish a time |
| Age | Median finish | Median against the cutoff | Finishers |
|---|---|---|---|
| 18-19 | - | 1 - too few finishers to publish a time | |
| 20-34 | 5:44:20 | 58 | |
| 35-39 | 5:49:14 | 36 | |
| 40-44 | 5:58:34 | 47 | |
| 45-49 | 5:43:40 | 28 | |
| 50-54 | 6:17:51 | 22 | |
| 55-59 | 6:35:31 | 9 - small sample, read with care | |
| 60-64 | 6:39:39 | 3 - small sample, read with care | |
| 65-69 | - | 2 - too few finishers to publish a time |
Full bar: 20 finishers or more. Tick alone: fewer than 20, too few for a median to say much. The shaded row is the biggest group.
Where the finishers came from
17% of the finishers came from Croatia alone.
| Nation | Finishers | Share |
|---|---|---|
| Croatia HR | 110 17.1% | |
| Austria AT | 57 8.9% | |
| Italy IT | 57 8.9% | |
| Czechia CZ | 55 8.5% | |
| Germany DE | 54 8.4% | |
| Poland PL | 53 8.2% | |
| Slovenia SI | 40 6.2% | |
| Belgium BE | 23 3.6% | |
| France FR | 22 3.4% | |
| Hungary HU | 21 3.3% | |
| United Kingdom GB | 20 3.1% | |
| Romania RO | 19 3.0% | |
| Slovakia SK | 16 2.5% | |
| Ireland IE | 12 1.9% | |
| United States US | 8 1.2% | |
| Spain ES | 7 1.1% | |
| Serbia RS | 7 1.1% | |
| Bulgaria BG | 6 0.9% | |
| Canada CA | 5 0.8% | |
| Sweden SE | 5 0.8% | |
| Finland FI | 4 0.6% | |
| Netherlands NL | 4 0.6% | |
| Norway NO | 4 0.6% | |
| South Africa ZA | 4 0.6% | |
| Bosnia & Herzegovina BA | 3 0.5% | |
| Denmark DK | 3 0.5% | |
| Lithuania LT | 3 0.5% | |
| Türkiye TR | 3 0.5% | |
| Brazil BR | 2 0.3% | |
| Switzerland CH | 2 0.3% | |
| India IN | 2 0.3% | |
| Curaçao AN | 1 0.2% | |
| Argentina AR | 1 0.2% | |
| Chile CL | 1 0.2% | |
| Colombia CO | 1 0.2% | |
| Ecuador EC | 1 0.2% | |
| Iceland IS | 1 0.2% | |
| Latvia LV | 1 0.2% | |
| Montenegro ME | 1 0.2% | |
| Malta MT | 1 0.2% | |
| Portugal PT | 1 0.2% | |
| Singapore SG | 1 0.2% | |
| El Salvador SV | 1 0.2% | |
| Ukraine UA | 1 0.2% | |
| 34 other nations 24 other nations 14 other nations 4 other nations | 152 23.6% 47 7.3% 15 2.3% 4 0.6% |
Showing 20 of 44 nations. Showing 30 of 44 nations. Showing 40 of 44 nations. Showing 44 of 44 nations.
Bar length is against the largest nation. The smallest counts are drawn at a minimum visible width, so their bars are not to scale.
How these numbers were computed
These are times for runners who finished. They exclude everyone who started and did not, so they describe how long finishing took, not how long the race takes. Bands with only a handful of finishers move a lot from one edition to the next.
We plot the median, not the average. A handful of very quick runners drags the average well below the time half the field actually beat, so the median is the honest number to plan against.
Nationality here shows who travels to this race, not who runs it best. That alone is why a host nation tops almost every list.
Computed from the full official results, verified October 27, 2026 - Official results
Ask the course
Ask Istria 42K anything about climbs, pacing, crew or cutoffs.
Answers come from this course's data, your plan and your training.
Which climb should I respect most?
Livade to Grožnjan: +696 m over 15.7 km, from km 5.14. Hike the steep sections at an effort you could hold for hours - the race is decided after this climb, not on it.
Where can my crew meet me?
Livade, km 5.14 - your first checkpoint, and no crew can meet you there or further on: the organiser lists no crew access on Istria 42K.
Is 5h a realistic finish for me?
5h would put you in the faster half of 2026 finishers - the median was 5:43:40. It means holding 7:09/km overall.
The assistant answers that once it can see your training.
Build your Istria 42K plan and your question is the first thing waiting in the TrailMath Assistant. Your first 5 questions are free, no card.
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To answer this for you, the Course Assistant uses your training and your race plan.
Example answer
Your long runs peak at 15 km, so the plan builds to 4-hour long runs. Cutoff buffer at Grožnjan: 1h11.
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Aid stations and checkpoints
| Checkpoint | Km | Cumulative gain (m) | Cumulative loss (m) | Cutoff |
|---|---|---|---|---|
| Start - Motovun Services not published | 0 | 0 | 0 | - |
| Livade | 5.14 | 121 | 260 | Sat 13:00 |
| Grožnjan | 20.86 | 817 | 695 | Sat 16:00 |
| Buje | 27.83 | 872 | 884 | Sat 17:30 |
| Umag (Finish) Drop bag | 42 | 1,000 | 1,153 | Sat 20:00 |
Data is approximate and courses change between editions - always verify against the official race guide. Source: official race guide, verified October 27, 2026 - Official race website
FAQ
How much elevation gain does Istria 100 by UTMB - 42K have?
Istria 100 by UTMB - 42K has around 1,000 m of cumulative elevation gain and 1,153 m of loss over 42 km.
What is the cutoff time for Istria 100 by UTMB - 42K?
The overall Istria 100 by UTMB - 42K cutoff is 8 hours, with intermediate time barriers at major checkpoints. Winning times are typically around 3 hours.
How long is Istria 100 by UTMB - 42K?
Istria 100 by UTMB - 42K covers approximately 42 km, starting in Motovun, Croatia.
What is the highest point of Istria 100 by UTMB - 42K?
The highest point of Istria 100 by UTMB - 42K is Ridge between Livade and Grožnjan at 380 m.
How many aid stations does Istria 100 by UTMB - 42K have and which allow crew?
The checkpoint table lists 3 major aid points between the start and the finish. Personal crew assistance is not part of the published checkpoint data - check the official runner guide.
Training for this race?
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