Istria 100 - 168K 2027

April 2, 2027

Distance

168.3 km

Elevation gain

6510 m

Country

🇭🇷 Croatia

Download the GPX Official race website

Course weather at your time of passage

The forecast arrives five days before the start.

Here you'll find the elevation profile, an estimated finish time based on your UTMB Index and details of the 11 aid stations to plan your nutrition and hydration segment by segment.

What's your time based on your UTMB?

Times estimated by the RAVIT model, learned from real ultra-trail finish times. Enter your UTMB Index (utmb.world) to get a personalized estimate.

Predicted race time based on your UTMB Index® · smoothed times achieved by runners at your level in past editions

UTMB Index®

Peaking23h48

Normal day

at this level, the finish comes down to the cut-off time (45h09)

from Peaking (P10) to Survival mode (P90)extended based on 209,157 finishers from 222 racesCalibrated UTMB® points

Source

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Cut-off times and crew - Istria 100 - 168K · 2027

168 km race checkpoints: kilometers, elevation, crew, cut-off time and access
Aid station	Cum. km	Seg. km	Seg. D+	Seg. D-	Crew	Cut-off
PLOMIN LUKA	15.7	15.7	488 m	784 m	Forbidden	Fri 08:00 PM
MOŠĆENIČKA DRAGA	34.8	19.1	926 m	923 m	Allowed	Sat 12:00 AM
POKLON	51.4	16.6	1,430 m	501 m	Allowed	Sat 06:00 AM
BRGUDAC	66.1	14.8	231 m	442 m	Forbidden	Sat 09:00 AM
TRSTENIK	83.3	17.2	792 m	833 m	Forbidden	Sat 02:00 PM
BUZET	98.6	15.3	414 m	1,022 m	Allowed	Sat 06:00 PM
BUTONIGA	115.4	16.8	772 m	809 m	Forbidden	Sat 11:00 PM
LIVADE	130.9	15.5	641 m	668 m	Allowed	Sun 04:00 AM
GROŽNJAN	146.6	15.7	677 m	405 m	Forbidden	Sun 08:00 AM
BUJE	153.6	7.0	42 m	177 m	Forbidden	Sun 10:00 AM
UMAG	168.3	14.7	86 m	236 m	—	Sun 02:00 PM

Data from the official race rules, checked for every edition. The race rules prevail. Positions are interpolated along the GPX track and are a guide, not official course marking.

What you'll find at each aid station

Aid station contents: products in rows, aid stations in columns
Product	PLOMIN LUKAkm 15.7	MOŠĆENIČKA DRAGAkm 34.8	POKLONkm 51.4	BRGUDACkm 66.1	TRSTENIKkm 83.3	BUZETkm 98.6	BUTONIGAkm 115.4	LIVADEkm 130.9	GROŽNJANkm 146.6	BUJEkm 153.6	UMAGkm 168.3
Water	available	available	available	available	available	available	available	available	available	available	available
Hot meal	unavailable	unavailable	unavailable	unavailable	unavailable	available	unavailable	unavailable	unavailable	unavailable	available

La feuille de ton assistance pour Istria 100 - 168K · 2027

Ton assistance peut te voir à ces postes. Ton plan RAVIT y met tes heures, ce qu'elle te tend et la route pour y aller.

MOŠĆENIČKA DRAGAkm 34.8
POKLONkm 51.4
BUZETkm 98.6
LIVADEkm 130.9

Recto, verso et planche d'étiquettes, en PDF : l'exemple d'une coureuse de l'UTMB.

Elevation profile

The course and its aid stations

Loading track…

GPX

ravit.live

Istria 100 - 168K: times, aid-station stops and fuelling needs by UTMB® Index

Between a UTMB® Index of 500 and 800, the estimated finish time on this race runs from 33h40 to 20h59. These times include aid-station stops: they come from real durations between two timing points, and this race's timing does not measure stops separately.

Source

Below a UTMB® Index of roughly 315, the overall cut-off of 45h00 is no longer reachable at the estimated pace.

Estimated time, stop time and fuelling needs on Istria 100 - 168K by UTMB Index
UTMB® Index	Estimated time	Night hours	Carbs	Fluid	Sodium	Cut-off margin
500	33h40	15.7	2,020 g	23.6 L	16,833 mg	+11h20
550	30h28	12.5	1,828 g	21.3 L	15,233 mg	+14h32
600	26h54	10	1,614 g	18.8 L	13,450 mg	+18h06
650	25h46	10	1,546 g	18 L	12,883 mg	+19h14
700	23h19	10	1,399 g	16.3 L	11,658 mg	+21h41
750	21h45	10	1,305 g	15.2 L	10,875 mg	+23h15
800	20h59	10	1,259 g	14.7 L	10,492 mg	+24h01

Figures based on 60 g of carbohydrate, 700 mL of fluid and 500 mg of sodium per hour, "average" preparation and mild conditions (15–25 °C). Above 25 °C, count on roughly 900 mL/h and 700 mg/h. Carbohydrate intake is trained: 60 g/h is a floor, 90 g/h assumes a glucose-fructose blend and a gut used to it.

Measured on the 2026 edition: the field checkpoint by checkpoint

374 starters, 31.6% DNF rate, 11 timed checkpoints.

Duration of each segment on edition 2026: median and middle half of field
Segment	km	Median	Middle half	Measured	Median passage	Still ranked
Labin → Plomin	15.5	1 h 56	1 h 44 – 2 h 08	373	1 h 55	373
Plomin → Moscenicka Draga	35.1	3 h 15	2 h 53 – 3 h 44	368	5 h 08	368
Moscenicka Draga → Poklon	51.9	3 h 56	3 h 24 – 4 h 24	347	9 h 00	347
Poklon → Brgudac	66.8	2 h 27	2 h 07 – 2 h 54	335	11 h 24	335
Brgudac → Trstenik	84.3	3 h 55	3 h 27 – 4 h 16	325	15 h 19	325
Trstenik → Buzet	99.7	3 h 00	2 h 33 – 3 h 28	306	18 h 20	306
Buzet → Butoniga	117.1	3 h 55	3 h 12 – 4 h 33	276	22 h 07	276
Butoniga → Livade	132.2	3 h 16	2 h 51 – 3 h 48	262	25 h 27	262
Livade → Groznjan	147.6	3 h 33	3 h 01 – 4 h 11	256	28 h 59	257
Groznjan → Buje	154.4	1 h 24	1 h 08 – 1 h 42	256	30 h 24	257
Buje → Umag	169.2	2 h 37	2 h 04 – 3 h 03	256	32 h 57	256

“Median passage” is elapsed time from the start, not a clock time: the clock time depends on the edition.

Where runners drop out. Buzet (30) · Moscenicka Draga (21) · Trstenik (19) out of 118 total DNFs.

RAVIT record from the official timing of the 2026 edition, data from September 23, 2026.

Source

See segment-by-segment analysis of Istria 100 - 168K

In the 2027 ranking

Istria 100 - 168K is 168 km and 6,510 m of elevation gain, that's 233 km-effort: category XXL, among 59 races in 2027. Its time limit of 45 h requires a minimum speed of 3.7 km/h: rank 33 out of 51 of the widest cut-off times in XXL.

XXL ultra-trails 2027: 210 km-effort and above

Similar effort in 2027

Trail Verbier St Bernard - X-Alpine · 234 km-effort
PROVITAL BACKYARD ULTRA - GRAN CANARIA - 30 Loops · 232 km-effort
Ultra-Trail Australia - UTAMiler · 234 km-effort

Other trails worth preparing for

Sources and method

Time projection — times by UTMB Index are taken from the actual splits of runners in each level band on previous editions of this race, aid station stops included. No formula is used as long as these results exist.
Trail nutrition — hourly targets for carbohydrate, fluid and sodium follow the commonly accepted ultra-endurance guidance. La Clinique du Coureur — Fuelling in trail running
Course, aid stations and cut-offs — taken from the event's official rules, which prevail in case of any discrepancy. Official site — Istria 100 - 168K

Weather for Istria 100 - 168K

The weather for Istria 100 - 168K will appear here as soon as the forecast models reach that date, around five days before the start: feels-like temperature, rain, snow, wind and storms, section by section and at your passage time.

Detailed weather for Istria 100 - 168K, hour by hour on the course

Frequently asked questions

How many checkpoints?

Istria 100 - 168K has 11 checkpoints: 2 aid stations and 9 water points. Details are in the two tables above.

What's the longest segment without aid?

The one leading to MOŠĆENIČKA DRAGA: 19.1 km and 0 m elevation gain. That's the one to load up for first.

How do I find the exact location of an aid station?

The Google Maps icon in the “Access” column opens the aid station's location: handy for planning your crew's routes.

What distance and elevation gain?

Istria 100 - 168K is 168 km long with 6510 m of elevation gain.

How long to finish?

With a UTMB Index of 600 (average runner), the estimated time is around 26h54 for Istria 100 - 168K.

What's the weather forecast?

The weather for Istria 100 - 168K will be published on this page around five days before the start, once the forecast models reach the race date. It will be detailed section by section: feels-like temperature, rain, snow, wind and storms.

Want to stack the odds in your favor for Istria 100 - 168K?

In 2 minutes, RAVIT generates your complete plan: segment-by-segment time, carbs, water and sodium at every aid station, printable roadbook.

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