Iowa · 25K · 12K · 5K
Geode Challenge Races
Geode Challenge Races is a 25K, 12K and 5K event held in Danville, Iowa. It was last held on October 17, 2026 and is usually run in October; the next date hasn't been announced yet. About 64 runners take part across all distances.
- Usually held
- October
- Location
- Danville, IA
- Field size
- ~64 runners
Race details
- Last held
- October 17, 2026
- Usually held in
- October
- Location
- Danville, Iowa
- Distances
- 25K, 12K, 5K
- Field size
- About 64 runners
- Course
- Rolling to hilly trail terrain with numerous hills and a creek crossing; organizer describes roughly 800 ft of vertical gain on the 12K perimeter loop (unverified, no official profile published), doubled for the 25K
- Registration
- ultrasignup.com
- Official website
- friendsofgeode.org
Registration, course & weather
- Registration status
- Registration status as last checked September 28, 2026: open
- Entry fee
- Listed fee for the longest distance, $45 (from friendsofgeode.org, checked September 28, 2026)
- Start time
- 9:00 AM CDT
- Course profile — 5K
- Out-and-back course; Mostly trail, some road
- Course profile — 12K
- Loop course; Mostly trail, some road
- Course profile — 25K
- Loop course; Mostly trail, some road
- Typical race-day weather
- about 68°F at the start, 88% humidity, 10 mph wind (based on the 2025 race day, measured near the city center rather than the exact start line; Open-Meteo, checked September 28, 2026)
About the Geode Challenge Races
The Geode Challenge Races are an annual trail run at Geode State Park in Danville, IA, offering a 5K out-and-back, 12K perimeter loop, and 25K double-loop option over varied dirt, rock and grass trail. Organized by Friends of Geode to raise funds for park improvements, the race is dog-friendly and includes a t-shirt and finisher geode.
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Geode Challenge Races: common questions
- When is the Geode Challenge Races?
- The next date hasn't been announced in the listing yet. The race is usually held in October. Check the organiser's website for the official date.
- Where is the Geode Challenge Races held?
- In Danville, Iowa.
- What distances does the Geode Challenge Races offer?
- 25K, 12K and 5K.
- How many people run the Geode Challenge Races?
- About 64 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 Geode Challenge Races?
- Registration is handled by the organiser at ultrasignup.com. Entry fees, caps and deadlines are set there.
- Is registration open for the Geode Challenge Races?
- Registration status as last checked September 28, 2026: open. Listed fee for the longest distance, $45 (from friendsofgeode.org, checked September 28, 2026).
- What time does the Geode Challenge Races start?
- 9:00 AM CDT.
- What is race-day weather usually like at the Geode Challenge Races?
- about 68°F at the start, 88% humidity, 10 mph wind (based on the 2025 race day, measured near the city center rather than the exact start line; Open-Meteo, checked September 28, 2026).
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