Idaho · Fall Creek Beast 50k · 1/2 Marathon
Fall Creek Beast
Fall Creek Beast is a Fall Creek Beast 50k and 1/2 Marathon event held in Swan Valley, Idaho. Its next confirmed date is Saturday, October 31, 2026. About 300 runners take part across all distances.
- Race day
- October 31, 2026
- Location
- Swan Valley, ID
- Field size
- ~300 runners
Race details
- Date
- Saturday, October 31, 2026
- Location
- Swan Valley, Idaho
- Distances
- Fall Creek Beast 50k, 1/2 Marathon
- Field size
- About 300 runners
- Course
- 50K: 6,000 ft gain; Half Marathon: 2,700 ft gain (both per organizer)
- Registration
- fallcreekbeast.com
- Official website
- fallcreekbeast.com
Registration, course & weather
- Registration status
- Open
- Entry fee
- Listed fee for the longest distance, $99 (from fallcreekbeast.com, checked September 28, 2026)
- Start time
- 6:00 AM MDT
- Course profile — Half Marathon
- Out-and-back course; Mostly trail, some road; 2700 ft gain (official course data); Not USATF certified
- Course profile — 50K
- Loop course; Mostly trail, some road; 6000 ft gain (official course data); Not USATF certified
About the Fall Creek Beast
Fall Creek Beast is a Halloween-morning trail race in Swan Valley, Idaho offering a 50K (6,000 ft gain) and half marathon (2,700 ft gain), both climbing the course's signature ascent, Prospector Peak, starting and finishing at Rainbow Valley Ranch off Fall Creek Road.
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Guides from the RaceRove blog
- 8 min read How to Choose the Best Half Marathon for a PR, Racecation or 50-State Challenge The best half marathon depends on what you want from it. How to choose a course for a personal record, a race worth travelling for, or an efficient stop on a 50-state challenge.
- 7 min read How to Find a 5K, 10K, Half Marathon or Marathon Near You A practical way to find running races near you: pick a distance, decide how far you'll travel, read the listing properly and confirm the details before you register.
- 9 min read How to Run a Race in All 50 States How to plan a 50-state running challenge: set your own rules, group states into trips, build a calendar around the seasons, budget for it and keep track of every finish.
- Blog All guides Planning advice for finding, choosing and travelling to races.
Fall Creek Beast: common questions
- When is the Fall Creek Beast?
- The next confirmed date is Saturday, October 31, 2026.
- Where is the Fall Creek Beast held?
- In Swan Valley, Idaho.
- What distances does the Fall Creek Beast offer?
- Fall Creek Beast 50k and 1/2 Marathon.
- How many people run the Fall Creek Beast?
- About 300 runners across all of its distances. That figure is an estimate of the field size, not an entry cap.
- How do I register for the Fall Creek Beast?
- Registration is handled by the organiser at fallcreekbeast.com. Entry fees, caps and deadlines are set there.
- Is registration open for the Fall Creek Beast?
- Yes — registration is open. Listed fee for the longest distance, $99 (from fallcreekbeast.com, checked September 28, 2026).
- What time does the Fall Creek Beast start?
- 6:00 AM MDT.
Plan this race in RaceRove
Save it to your plan, compare it with other races, check typical race-day weather and track your 50-state progress in the interactive app.