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RIVER OF NO RETURN ENDURANCE RUNS
UltraUnited StatesIdaho

RIVER OF NO RETURN ENDURANCE RUNS2027

19.06.2027Challis (United States)
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Pacing, fueling and crew sheet for the course you pick

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3 courses · 32–108 km · up to 5’200 m D+

3 courses

  1. 32km

    1’440 m D+

    avg 5%

    32KM

    19.06.

    UTMB Index 20K

  2. 54.4km

    2’840 m D+

    avg 5%

    55KM

    19.06.

    UTMB Index 50K

  3. 108km

    5’200 m 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.

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The race

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 108k, where you’ll be challenged by varying terrain and awed by gorgeous scenery.

Where to stay

Find a place to stay near Challis for the race.

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