Skip to content
Endurance AnalyticsEndurance Analytics
  • Calendar
  • Trail Finder
  • Geo Quiz
  • Blog
  • AI Buddy
  • Contact
For organizers
Trail runningBiathlonSkiingSkimoOlympicsCalendarTrail FinderGPX AnalyzerRace Pace CalculatorAI BuddyComparePricingConnect AIBlog
For organizersRace website assistantFind my racePricingDocumentation

Know the course before you run it

© 2026 Endurance Analytics. All rights reserved.

Privacy policyTerms of serviceRefundsContact
  1. Home
  2. Trail running
  3. 2026
  4. Obala Ultra Trail
Obala Ultra Trail
108km10864km6435km3517km1711km11

17km

17.0km·450m+
November 7, 11:30 AM
Korte,
Slovenia
source

Race Pace Calculator · GPX Analyzer · Trail Finder

17km · Race profile

Distance
17.0km
Gain
450m+
FlatKM
20.4
Max
255m
Min
-2m

Other races: Slovenia

  • GO4Trail · GO TRIMNovember 7, 2026 · 13.3km · 814m+
  • Kočevsko Outdoor Festival · 14kmMay 29, 2027 · 14.1km · 304m+
  • Čaven Run · Čaven TrailNovember 21, 2026 · 17.0km · 1293m+
  • Čaven Run · Čaven VertikalNovember 21, 2026 · 4.3km · 1074m+
  • Kočevsko Outdoor Festival · 10kmMay 29, 2027 · 10.2km · 223m+
  • Kočevsko Outdoor Festival · 31.7kmMay 29, 2027 · 31.7km · 1016m+

Read

  • How to Taper for a Marathon, Half Marathon or Ultra
  • Types of Runs and What Each Workout Actually Trains
  • Hill Training for Trail Runners: Train the Descents

Full calendar: Slovenia

About 17km

17km is the 17.0km trail race at Obala Ultra Trail 2026 (Korte, Slovenia). The race starts on November 7, 2026 at 11:30 AM. It starts in Korte and finishes in Izola. The time limit is 4 h.

Race strategy

Short race: go all out.

  • Hold your race pace up to 7.5km, but stay in control.
  • The finish is runnable. Save your legs to run it all the way.
  • Go easy on the first downhill, save your quads on the descents until 6.4km, then run your race pace.
  • Start · 0.0km–2.3km · Race-day nerves push your heart rate up: don't follow the crowd, find your own rhythm.
  • Work · 2.3km–7.5km · Descent of 272m averaging 4%, high point 255m. Plus 1 more climb. This is where the race is built: steady, solid effort. Climb by heart rate or breathing, not pace. This descent is hard on the legs: short steps, stay in control, poles if you have them.
  • Home · 7.5km–16.5km · 9.0km of runnable trail. Kick for the line: give it everything you've got. Running pays off here: run wherever you can.

Course

The course climbs 450m+. With 26m/km of climbing, this is a rolling, mostly runnable course. By gradient, 23% of the distance is uphill, 46% downhill and 31% flat. The longest climb runs 1.1km at an average 11.5% grade (130m of vertical). The longest descent runs 6.4km at an average 4.3% grade (272m of vertical). The steepest climb averages 18.9% over 0.2km. The steepest descent drops at 27.9% over 0.3km. Surface: 50% smooth, 41% road, and 9% trail. Flat-equivalent effort: 20.4 FlatKM.

Summits

The highest summit on the course is Ronek (116m), 13.9km from the start. The course also passes close to Trmun (207m) and Vrh (188m).

Poles

The course is runnable enough that trekking poles are not needed.

Quad damage

Quad damage risk is low (index 8 of 100): a few descents worth noting, none of them decisive.

  • Go easy on the first downhill, save your quads on the descents until 6.4km, then run your race pace.
  • #1 · 0.0–6.4 km · 272 m D−, -4.3% · 10.1 km ahead → control

Weather

On race day, start temperatures have historically ranged from 10°C to 17°C, with around 14°C at the highest point; the chance of precipitation is about 42%. Heavy rain of 10.0mm or more falls on about 17% of days around this date.

This page has a pacing and nutrition planner, a gradient matrix, an interactive elevation profile and historical weather for 17km.

Other distances of Obala Ultra Trail 2026108km (108km)·64km (64.0km)·35km (35.0km)·11km (11.0km)

Official websitewww.obalaultratrail.si