River Of No Return Endurance Runs

Trail Running covering 29.1 km to 109.8 km with up to 4,980 m D+ in Challis (Idaho, United States)

Location

Challis, Idaho, United StatesShow on map(44.5046° N, 114.2317° W)

Date & StatusDate to be announcedDate TBA

First edition2004

Elevation gainUp to +4,980 m

River Of No Return Endurance Runs is an endurance sporting event in Challis, Idaho, US focused on Trail Running. First held in 2004, the event is an established fixture on the endurance calendar. It is part of UTMB Index Races. Key features include Mountain, Nature & Off-Road, High Altitude.

The race program comprises 3 competitions, including 108 Km (109.8 km, +4,980 m D+), 55 Km (54.4 km, +2,840 m D+), and 32 Km (29.1 km, +1,440 m D+). The exact date for the next edition is currently open and will be announced by the organizer. Official race regulations, course details, and registration information are provided on the organizer's website (runchallis.com).

Official website

River Of No Return Endurance Runs in Challis (Work: "Alpine Ridge Trail Top Rocky Mountain NP 2024", Photo: Larry D. Moore, License: CC BY 4.0, Source: Wikimedia Commons) — "Alpine Ridge Trail Top Rocky Mountain NP 2024" · Photo: **Larry D. Moore** · Wikimedia CommonsCC BY 4.0
Cropped to 16:9 (960 × 540 px), WebP

Event characteristics

Mountain Nature & Off-Road High Altitude

Races & distances (3)

Competition	Discipline	Distance	Elevation gain	Altitude range	Course type	Course & profile
108 Km	Trail Running	109.8 km	+4,980 m	1,150 m - 3,242 m	Loop course	Route & profile
55 Km	Trail Running	54.4 km	+2,840 m	1,153 m - 2,346 m	Loop course	Route & profile
32 Km	Trail Running	29.1 km	+1,440 m	1,156 m - 1,761 m	Loop course	Route & profile

Course & Elevation Telemetry

Course route & map

Distance

109.8 km

Elevation gain

+4,980 m D+

Elevation loss

-4,980 m D-

Altitude range

1,150 m - 3,242 m

Gradient (Avg / Max)

9.1 % / 16.4 %

Course format

Loop course

109.8 km+4,980 m D+Peak 3,242 m

Start (S)Finish (F)DownhillFlatClimbSteep

Elevation profile & course telemetry

Altitude from 1,150 m to 3,242 m above sea level (+4,980 m D+, -4,980 m D-)

Peak: 3,242 m·at 30.3 km·Ø 9.1 %

Event Information & Answers

Frequently asked questions (FAQ)

When and where does River Of No Return Endurance Runs take place?

River Of No Return Endurance Runs takes place in Challis, Idaho, US (start area at coordinates 44.5046° N, 114.2317° W). The exact date for the next edition is currently open and will be announced by the organizer.

What races and distances are offered at River Of No Return Endurance Runs?

The race program comprises 3 competitions, including 108 Km (109.8 km, +4,980 m D+), 55 Km (54.4 km, +2,840 m D+), and 32 Km (29.1 km, +1,440 m D+). The competitions belong to Trail Running.

What is the course layout and elevation profile for River Of No Return Endurance Runs?

The main competition (108 Km over 109.8 km) is designed as a loop course featuring +4,980 m of elevation gain and -4,980 m of elevation loss, ranging between 1,150 m and 3,242 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 River Of No Return Endurance Runs?

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