How hilly is the Boulderthon Marathon?
The Boulderthon Marathon is described as gently rolling. The course listing puts the climb at 184 m.
Boulderthon Marathon
This race edition
- Race date
- Date not confirmed for this distance
- Race timezone
- Timezone not confirmed
- Edition status
- Status not confirmed
Entry options
2026 edition
Entry options are not yet confirmed for this edition. Check the organiser before making plans.
Decision summary
Boulderthon Marathon at a glance
- Typical conditions
- 81/100
- Evidence depth
- 35 verified facts
Historical race-date favourability, not a forecast
Source facts available
Route details
Known course facts at a glance
Boulderthon Marathon has known course details for its marathon race. The summary below keeps the focus on what is confirmed for the course.
- Official distance
- 42.2 km
- Terrain
- Road
- Scenery
- Mountain, Lakeside, City, Historic, Coastal, Countryside
Quick answers
What runners ask first
Where does the Boulderthon Marathon route go?
The Boulderthon Marathon route starts at Pearl Street Mall, downtown Boulder and finishes at Pearl Street Mall in downtown Boulder. Underfoot, expect road (paved Boulder back roads and downtown brick streets). It passes Downtown Boulder, Pearl Street Mall, Flatirons foothills, Boulder Reservoir and Boulder back roads. Marathon course starts in downtown Boulder, climbs up past the Boulder Reservoir, then returns to a finish on the historic Pearl Street Mall.
Race character
Scenery
- Mountain
- Lakeside
- City
- Historic
- Coastal
- Countryside
Atmosphere
- Big City
- Festival
- Destination
Terrain
- Road
- Elevation character
- Gently Rolling
- Technicality
- Non Technical
- Source-stated ascent
- 184 m
Entry, logistics and records
Records and field
- Field size
- 15000+ participants across all distances
Entry requirements
- Entry status
- Open entry: The held registration model is open entry and this edition is not marked sold out.
- Qualification status
- Boston Marathon qualifier; USATF Sanctioned and measured by a Level A USATF course measurer
Race day logistics
- Expo / packet pickup
- Lively Race Expo on Pearl Street Mall (between 14th & 15th) with 70+ local and national partners; official bib pickup Fri 9/25 2pm-6pm and Sat 9/26 10am-6pm
- Race village
- No
- Medal
- All finishers receive a limited-edition finisher medal and finisher shirt
- Finisher tee
- Finisher technical shirt from lululemon
Access and course status
- Start
- Pearl Street Mall, downtown Boulder
- Finish
- Pearl Street Mall in downtown Boulder
Course facts
- Course type
- Point To Point
- Surface
- Road (paved Boulder back roads and downtown brick streets)
- Landmarks
- Downtown Boulder, Pearl Street Mall, Flatirons foothills, Boulder Reservoir, Boulder back roads
- Notable features
- First-come first-served registration
- race typically sells out and has grown to be one of the fastest-growing fall races in the US
- finisher technical shirts provided by lululemon
- Marathon course starts in downtown Boulder, climbs up past the Boulder Reservoir, then returns to a finish on the historic Pearl Street Mall
What are typical race-day conditions?
- 16°CTypical temperature
- 14 kphTypical wind
- 1 mmTypical rainfall
- 81Favourability /100