Trail RunningUTMB World Series

Istria 100 by UTMB

Trail Running covering 21.5 km to 168.2 km with up to 7,140 m D+ in Umag (County of Istria, Croatia)

LocationUmag, Istrische Županie, CroatiaShow on map(45.4372° N, 13.5257° E)
Date & StatusApril 1, 2027 to April 4, 2027Date confirmed
Elevation gainUp to +7,140 m

Istria 100 by UTMB is an endurance sporting event in Umag, Istrische Županie, HR focused on Trail Running. It is part of UTMB World Series. Key features include Nature & Off-Road, Seaside & Coast, Multi-Day, Mountain.

The race program comprises 5 competitions, including 168K (168.2 km, +7,140 m D+), 110K (111.4 km, +4,074 m D+), 69K (69.6 km, +2,331 m D+), 42K (42.5 km, +1,153 m D+), and 21K (21.5 km, +157 m D+). The next edition is officially confirmed from April 1, 2027 to April 4, 2027. Official race regulations, course details, and registration information are provided on the organizer's website (istria.utmb.world).

Official website
Istria 100 by UTMB in Umag (Work: "Triglav Lakes Valley Mountain Lodge in Slovenia's Julian Alps", Photo: Bob Ramsak, License: CC BY-SA 4.0, Source: Wikimedia Commons)
"Triglav Lakes Valley Mountain Lodge in Slovenia's Julian Alps" · Photo: Bob Ramsak · Wikimedia CommonsCC BY-SA 4.0
Cropped to 16:9 (960 × 540 px), WebP · Shared under the same license

Event characteristics

Nature & Off-RoadSeaside & CoastMulti-DayMountainHigh Altitude

Races & distances (5)

CompetitionDisciplineDistanceElevation gainAltitude rangeCourse typeCourse & profile
168KTrail Running168.2 km+7,140 m2 m - 3,001 mLoop courseRoute & profile
110KTrail Running111.4 km+4,074 m5 m - 1,716 mLoop courseRoute & profile
69KTrail Running69.6 km+2,331 m8 m - 987 mLoop courseRoute & profile
42KTrail Running42.5 km+1,153 m11 m - 495 mLoop courseRoute & profile
21KTrail Running21.5 km+157 m14 m - 80 mLoop courseRoute & profile
Course & Elevation Telemetry

Course route & map

Distance
168.2 km
Elevation gain
+7,140 m D+
Elevation loss
-7,140 m D-
Altitude range
2 m - 3,001 m
Gradient (Avg / Max)
8.5 % / 15.3 %
Course format
Loop course
168.2 km+7,140 m D+
Start (S)Finish (F)
N255075100125150FS45.4372° N, 13.5257° E

Elevation profile & course telemetry

Altitude from 2 m to 3,001 m above sea level (+7,140 m D+, -7,140 m D-)

Peak: 3,001 m·at 68.7 km·Ø 8.5 %
2 m1,002 m2,001 m3,001 m0 km33.6 km67.3 km100.9 km134.6 km168.2 km3,001 m
Event Information & Answers

Frequently asked questions (FAQ)

When and where does Istria 100 by UTMB take place?

Istria 100 by UTMB takes place in Umag, Istrische Županie, HR (start area at coordinates 45.4372° N, 13.5257° E). The next edition is officially confirmed from April 1, 2027 to April 4, 2027.

What races and distances are offered at Istria 100 by UTMB?

The race program comprises 5 competitions, including 168K (168.2 km, +7,140 m D+), 110K (111.4 km, +4,074 m D+), 69K (69.6 km, +2,331 m D+), 42K (42.5 km, +1,153 m D+), and 21K (21.5 km, +157 m D+). The competitions belong to Trail Running.

What is the course layout and elevation profile for Istria 100 by UTMB?

The main competition (168K over 168.2 km) is designed as a loop course featuring +7,140 m of elevation gain and -7,140 m of elevation loss, ranging between 2 m and 3,001 m above sea level. An interactive course map with route visualization, elevation profile, and GPX export is available in the course section on this page.

Where can I find registration and official race rules for Istria 100 by UTMB?

Official race regulations, course details, and registration information are provided on the organizer's website (istria.utmb.world).