Skip to content
kliva
RIVER OF NO RETURN ENDURANCE RUNS
UltraUnited StatesIdaho

RIVER OF NO RETURN ENDURANCE RUNS 2027

19.06.2027Challis (United States)
Build your race plan →

Pacing, fueling and crew sheet for the course you pick

RegisterOfficial siteWrong info?

Start line in

 

3 courses · 32–108 km19.9–67.1 mi · up to 5’200 m D+up to 17’060 ft D+

At a glance

RIVER OF NO RETURN ENDURANCE RUNS 2027 takes place on Saturday 19 June 2027 in Challis (Idaho, United States). Three distances to choose from: 32, 54.4 and 108 km.

Longest course: 108 km with 5’200 m D+ (48 m per km: mountain terrain).

On Kliva, plan your pacing and nutrition for free, then send the plan to your watch.

With a start and finish in Challis, Idaho, the River of No Return (RONR) Endurance Runs offer runners a unique opportunity to experience Idaho’s remote beauty. Choose between distances of 32k, 55k, or…
From the organiser

3 courses

  1. 32km19.9mi

    1’440 m D+4’724 ft D+

    avg 5%

    32KM

    19.06.

    UTMB Index 20K

  2. 54.4km33.8mi

    2’840 m D+9’318 ft D+

    avg 5%

    55KM

    19.06.

    UTMB Index 50K

  3. 108km67.1mi

    5’200 m D+17’060 ft D+

    avg 5%

    108KM

    19.06.

    UTMB Index 100K

GPX trace not yet published.

Race plan

Plan your race from start to finish.

Pacing, aid stations and fueling timed to your effort on RIVER OF NO RETURN ENDURANCE RUNS, in one roadbook.

Build your race plan →

Start

Challis (United States)

Skip the map

Where to stay

Find a place to stay near Challis for the race.

We may earn a commission if you book through this map, at no extra cost to you.

Spotted wrong info on this page? Tell us and we'll review it. Report it

← Back to calendar