Where can I find the Chubb Trail Races (Double Chubb) - Eureka Ultramarathon route map?
Use the official course links on this page for the organiser route page, map PDF or route download.
Official course linksChubb Trail Races (Double Chubb) - Eureka Ultramarathon
This race edition
- Race date
- Date not confirmed for this distance
- Race timezone
- Timezone not confirmed
- Edition status
- Status not confirmed
Entry options
2027 edition
Entry options are not yet confirmed for this edition. Check the organiser before making plans.
Official event website & entry ↗Data current as of
Decision summary
Chubb Trail Races (Double Chubb) - Eureka Ultramarathon at a glance
- Cut-off average pace
- 10:48/km
- Typical conditions
- 82/100
- Evidence depth
- 40 verified facts
9:00:00 total limit divided by distance. Check gun/chip timing and intermediate limits; allow time for stops.
Historical race-date favourability, not a forecast
Source facts available
Route details
Known course facts at a glance
Chubb Trail Races (Double Chubb) - Eureka Ultramarathon has known course details for its ultramarathon race. The summary below keeps the focus on what is confirmed for the course.
- Official distance
- 50 km
- Terrain
- Trail, Mixed, Road, Gravel
- Scenery
- Parkland, Riverside, Forest, Countryside
Quick answers
What runners ask first
How hilly is the Chubb Trail Races (Double Chubb) - Eureka Ultramarathon?
The Chubb Trail Races (Double Chubb) - Eureka Ultramarathon is described as hilly. The course listing puts the climb at 1,006 m.
Where does the Chubb Trail Races (Double Chubb) - Eureka Ultramarathon route go?
The Chubb Trail Races (Double Chubb) - Eureka Ultramarathon route starts at West Tyson County Park, 131 N. Outer Rd East, Eureka, Missouri 63025 (parking along Lewis Road) and finishes at West Tyson County Park, Eureka, Missouri. Underfoot, expect 80% single track, 14% gravel, 6% asphalt. It passes Meramec River, Chubb Trail and two railroad crossings. Course varies from a gravel service road, to a mostly dirt trail along the Meramec River, to a mile-long series of climbs, to a rolling trail winding through the hills above the Meramec River.
Race character
Scenery
- Parkland
- Riverside
- Forest
- Countryside
Atmosphere
- Community
- Competitive
- Wilderness
Terrain
- Trail
- Mixed
- Road
- Gravel
- Elevation character
- Hilly
- Technicality
- Moderate
- Source-stated ascent
- 1,006 m
Entry, logistics and records
Records and field
- Men's course record
- 3:37:15 (Ben Creehan)
- Women's course record
- 4:34:11 (Christine Crawford)
- Field size
- Distances offered: 50K, 25K, 25K Ruck (carry a 20+ lb pack), and 8 mile
Entry requirements
- Entry status
- Open entry: The held registration model is open entry and this edition is not marked sold out.
- Cut-off
- Approximately 9-hour overall cutoff for all races; 50K runners must complete the first loop by about the 4-hour mark
- Qualification status
- None (open ultra; no qualifier required)
Race day logistics
- Medal
- All finishers receive a medal
Access and course status
- Start
- West Tyson County Park, 131 N. Outer Rd East, Eureka, Missouri 63025 (parking along Lewis Road)
- Finish
- West Tyson County Park, Eureka, Missouri
Course facts
- Course type
- Out And Back
- Surface
- 80% single track, 14% gravel, 6% asphalt
- Landmarks
- Meramec River, Chubb Trail, two railroad crossings
- Notable features
- Final finishers in each distance receive a custom Sluggiest Slug award
- SLUG members get a $10 registration discount
- post-race burgers, veggie burgers and beer
- Course varies from a gravel service road, to a mostly dirt trail along the Meramec River, to a mile-long series of climbs, to a rolling trail winding through the hills above the Meramec River
- No stream crossings
- a high-water alternate route is used if the Meramec River is flooded
- Two railroad crossings on course where extreme caution is required as trains pass through at high speed
- Runners may encounter deer, turkey and other wildlife on the trail
- Cup-free event
- runners bring their own bottle or hydration pack to refill at aid stations
- The 50K is two out-and-backs on the Chubb Trail (a double of the 25K Chubb course), hence the name Double Chubb
What are typical race-day conditions?
- 10°CTypical temperature
- 19 kphTypical wind
- 4 mmTypical rainfall
- 82Favourability /100