Arizona · Half Marathon · 10K · 5K (plus virtual option)
Chilly Willy Half Marathon
Chilly Willy Half Marathon is a half marathon, 10K and 5K (plus virtual option) event held in Tucson, Arizona. Its next confirmed date is Saturday, January 9, 2027. About 600 runners take part across all distances.
- Race day
- January 9, 2027
- Location
- Tucson, AZ
- Field size
- ~600 runners
Race details
- Date
- Saturday, January 9, 2027
- Location
- Tucson, Arizona
- Distances
- Half Marathon, 10K, 5K (plus virtual option)
- Field size
- About 600 runners
- Course
- Mostly flat, fast winter road course in Tucson
- Registration
- runsignup.com
Registration, course & weather
- Registration status
- Open
- Start time
- 9:00 AM MST
- Course profile
- Loop course; Road surface
About the Chilly Willy Half Marathon
A fast, cool-weather February half marathon, 10K and 5K in Tucson designed to take advantage of ideal winter running conditions.
Rankings and notes
- Rankings and awards
- A popular winter road race on the Tucson running calendar
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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.
Chilly Willy Half Marathon: common questions
- When is the Chilly Willy Half Marathon?
- The next confirmed date is Saturday, January 9, 2027.
- Where is the Chilly Willy Half Marathon held?
- In Tucson, Arizona.
- What distances does the Chilly Willy Half Marathon offer?
- Half Marathon, 10K and 5K (plus virtual option).
- How many people run the Chilly Willy Half Marathon?
- About 600 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 Chilly Willy Half Marathon?
- Registration is handled by the organiser at runsignup.com. Entry fees, caps and deadlines are set there.
- Is registration open for the Chilly Willy Half Marathon?
- Yes — registration is open. Listed fee for the longest distance, $55 (from runsignup.com, checked October 5, 2026).
- What time does the Chilly Willy Half Marathon start?
- 9:00 AM MST.
- What is the course like at the Chilly Willy Half Marathon?
- Loop course; Road surface.
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.