Race Information:

Start Times
Drop Bags
Post Race & Aid Station Food
Awards & Schwag
Refunds & Switching Distances
Age Minimums
Special Thanks
Challis Running
Where did the name River of No Return come from?

Start Times

[list] [litem type=”icon-star” color=”#515151″] 108k: 5:00 AM[/litem] [litem type=”icon-star” color=”#515151″]50k: 6:30 AM[/litem] [litem type=”icon-star” color=”#515151″] 25k: 8:00 AM[/litem] [/list]


Runners must DEPART the aid station by the following times:

Bayhorse Lake: 12 hours (5:00 pm)
Squaw Creek: 15 hours (8:00 pm); headlamps after 6:00 pm
Custer Motorway: 20 hours (1:00 am)
Finish: 21 hours (2:00 am)

Bayhorse: 6 hours (12:30 pm)
Finish: 12 hours (6:30 pm)

Aid station personnel will make announcements at 10 minutes and 5 minutes before the cutoff departure time and at the final cutoff time. Runners who have not departed the aid station area with their supplies, bottles, packs and pacer at the final cutoff will be pulled from the race immediately.

Drop Bags

[list] [litem type=”icon-star” color=”#515151″]All drop bags are collected on race morning at the start. Please look for the proper sign with your desired location. [/litem] [litem type=”icon-star” color=”#515151″]Please label your drop bag with your name and bib number. [/litem] [litem type=”icon-star” color=”#515151″]Please do NOT leave any valuables including keys, iPods, cell phones, etc in your drop bag. [/litem] [litem type=”icon-star” color=”#515151″]Challis Running and the Race Management is NOT responsible for the loss of any drop bags. [/litem] [/list]

Drop Bag Locations:

  • Bayhorse  (Mile 16)
  • Bayhorse Lake (Mile 36.5)
  • Buster Lake (Mile 53.6)


[list] [litem type=”icon-star” color=”#515151″]Crews are encouraged and welcomed to support all runners. Runners will be given one RONR CREW VEHICLE window tag to hang from their vehicle mirrors so that crew vehicles can be identified.[/litem] [litem type=”icon-star” color=”#515151″]Crews are NOT PERMITTED at Birch Creek Saddle, Keystone, Keystone Mountain, Juliette, Buster Lake. Crews accessing any of the other aid stations will result in their runner disqualification. Crews are not permitted to provide assistance to their runners outside of any designated aid stations and are not permitted to pace or drive next to their runners or provide light to their runners along the driving roads.[/litem] [litem type=”icon-star” color=”#515151″]As many crew members and supporters as desired are welcome to run with their runner from the upper end of Main Street in Challis to the Finish at the Challis City Park (approximately 1 mile).[/litem] [/list]

Pacers (108k only)

Pacers can be picked up at:

  • Bayhorse Lake (Mile 36.5)
  • Squaw Creek (Mile 45.6)
  • Custer Motorway (Mile 61.7)
[list] [litem type=”icon-star” color=”#515151″]Pacers are allowed in the 108K race beginning from Bayhorse Lake (Mile 36.5) to the finish. [/litem] [litem type=”icon-star” color=”#515151″]A pacer may also be picked up at McKay Creek TH (Mile 38), Fanny’s Hole (Mile 45), and the Custer Motorway (Mile 57) Aid Stations.[/litem] [litem type=”icon-star” color=”#515151″]You may have more than one pacer to help you get to the finish line, but runners may be accompanied by no more than one pacer at a time.[/litem] [litem type=”icon-star” color=”#515151″]Pacers need to check in prior to running, sign a pacer waiver, and need to clearly identify themselves at every aid station. [/litem] [litem type=”icon-star” color=”#515151″]Pacers should be well conditioned to travel the distance with their runner. [/litem] [litem type=”icon-star” color=”#515151″]Pacers are responsible for their own transportation to and from their starting location. Race management will not organize or facilitate any shuttle. [/litem] [litem type=”icon-star” color=”#515151″]Pacers may eat and drink from the aid station tables. Pacers must enter and exit with their runner. No “muling” is allowed. “Muling” is when a pacer carries any supplies (drinks, food, clothing, etc) for the runner outside of the aid station area. [/litem] [litem type=”icon-star” color=”#515151″]No dogs, no bikes, no horses.[/litem] [litem type=”icon-star” color=”#515151″]As many crew members and supporters as desired may accompany a runner from the upper end of Main Street in Challis to the Finish Line at the Challis City Park, approximately the last mile.[/litem] [/list]

Post Race Food

All finishers will be treated to a post race meal at the Challis City Park.

Aid Station Food

Potato Chips
Gummy Bears
Bread-Peanut Butter-Jelly
Coke-Pepsi-Sprite-Ginger Ale
Granola Bars
Otter Pops (100K select only)
Saltine Crackers
Potato Chips
Chicken Soup
PowerBar gels, blasts, etc.

Awards & Schwag

CASH awards:

[list] [litem type=”icon-star” color=”#515151″]108K: $1000, $500, $200, top 3 men and women[/litem] [litem type=”icon-star” color=”#515151″]50K $500, $250, $100 top 3 men and women[/litem] [litem type=”icon-star” color=”#515151″]25K $250, $125, $50[/litem] [/list]

The following overall places will be awarded: 

[list] [litem type=”icon-star” color=”#515151″]TOP 3 men/women overall.[/litem] [litem type=”icon-star” color=”#515151″]TOP 3 in each age division.[/litem] [litem type=”icon-star” color=”#515151″]TOP-3 Masters (over 40).[/litem] [/list]

What you get for your entry fee:  
[list] [litem type=”icon-star” color=”#515151″]All entrants  – RONR Custom Saucony Hydramax Tech Running Shirt[/litem] [litem type=”icon-star” color=”#515151″]All Finishers – RONR Custom Sandblasted Finishers Award (very unique)[/litem] [litem type=”icon-star” color=”#515151″]25K Finishers – RONR Custom Embroidered Saucony Throttle Running Hat[/litem] [litem type=”icon-star” color=”#515151″]Male 50K Finishers – RONR Custom Saucony Transition Sportop[/litem] [litem type=”icon-star” color=”#515151″]Female 50K Finishers – RONR Custom Saucony Transcendence Full Zip[/litem] [litem type=”icon-star” color=”#515151″]All 100K Finishers – RONR Custom Saucony X-Lite Packable Jacket[/litem] [litem type=”icon-star” color=”#515151″]TOP-3 Overall, TOP-3 Masters, TOP-3 Age Divisions – Custom Hand Made Stand for Finisher’s Award[/litem] [/list]

Refunds & Switching Distances

Please see the Registration page.

Age Limits – Minors

Those under 18 years old must get written consent from the race directors. If you feel you are able to run 10 or more miles through the mountains of Idaho and you are under 18, please contact info@challisrunning.com before registering. We will go over your resume and determine if you are capable of safely finishing the race. We may require a parent to stay with you throughout the race if you are very young. Parents check with race management first, then proceed to register. We reserve the right to remove anyone under 18 from the course at any time, if they failed to obtain parental permission and race management approval.

Special Thanks

[list][litem type=”icon-star” color=”#515151″]Custer County Search & Rescue.[/litem][/list]

The Mission of Challis Running

Our mission is to showcase the RONR Endurance Runs as a world-class ultra-running event. The RONR Endurance Runs provide a tangible backcountry experience for runners from the beginner to the elite level. Come test your mettle on these challenging courses! Directed by Paul Lind & Neal Russell.

River of No Return?

The Main Salmon River was called “The River of No Return” back in early mining days when boats could navigate down the river but could not get back up through the fast water and numerous rapids. The Salmon River flows through a canyon that is five thousand feet deep and nearly two hundred miles long. When Lewis and Clark encountered this gorge, they turned back and followed an old Indian route around the area. Early fur trappers also avoided the Salmon canyon. Because the canyon was too rugged for wagon roads, access was by packhorses over difficult trails or by river. Wooden, flat-bottomed boats were developed to take supplies and mining machinery from the end of the road at Salmon into the canyon. The Salmon River was too swift to bring these boats back up river for another trip, so they were dismantled, and the boards were used as lumber. Since these boats never came back to Salmon, the “River of No Return” as a term came into use around 1900. The romantic name lives on today, even though jet boats can navigate upstream.

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