Quick Info
Total miles: 80+ miles of trails. Surface: Mostly paved concrete. Major trails: Niver Creek, Big Dry Creek. Activities: Walking, biking, running. Connections: Links to Westminster, Broomfield, Denver trails. Fee: Free.
Thornton has built an impressive trail network connecting parks, neighborhoods, and open spaces. The system allows car-free travel across much of the city and links to regional trails reaching Denver and beyond.
Major Trails
Niver Creek Trail
One of Thornton's primary trails, following Niver Creek through the city. Connects neighborhoods, parks, and rec centers. Good commuter and recreation route.
Big Dry Creek Trail
Follows Big Dry Creek through Thornton and connects to Westminster's trail system. Part of a regional corridor extending well beyond city limits.
Eastlake Trail
Eastern Thornton trail connecting neighborhoods and parks. Links to the broader system.
Carpenter Park Trails
Trail network within and around Carpenter Park, connecting to the citywide system.
Trail Features
Surface
Primarily paved concrete suitable for road bikes, strollers, wheelchairs, and all non-motorized use.
Terrain
Generally flat to gently rolling. Easy for all fitness levels.
Access Points
Multiple trailheads and access points throughout the city. Parks often serve as trail hubs.
Regional Connections
To Westminster
Big Dry Creek Trail continues into Westminster, connecting trail systems. Bike between cities on connected paths.
To Broomfield
Trail connections extend toward Broomfield via Big Dry Creek and other routes.
To Denver
With route planning, trails connect to Denver's system via various regional paths.
Activities
Walking & Running
Popular for daily exercise. Flat terrain and smooth pavement make for easy workouts.
Biking
Road bikes and hybrids work well. Good for commuting to work, school, or shopping.
Family Outings
Safe, car-free routes for family bike rides and walks. Connects playgrounds and parks.
Tips
Get a trail map. Download from Thornton's website or pick up at rec centers.
Yield appropriately. Bikes yield to pedestrians. Announce when passing.
Connect to transit. Some trails connect to N Line stations for bike-and-ride commuting.
Morning and evening. Best times to avoid heat in summer.
Frequently Asked Questions
Are the trails connected?
Mostly yes. The system is designed as a network, though some gaps exist.
Can I bike to Denver?
With route planning, yes. The regional trail system connects, though some on-street sections may be required.
Are dogs allowed?
Yes, on leash. Clean up after your pet.
Is there lighting?
Some sections near parks and developed areas have lighting. Many sections are unlit.
Are e-bikes allowed?
Class 1 and 2 e-bikes generally allowed. Check current regulations.