Boulder Creek Trail – Flagstaff Road Scenic Drive loop from Greenlee Wildlife Preserve
Boulder Creek Trail – Flagstaff Road Scenic Drive loop from Greenlee Wildlife Preserve
2.7
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37
riders
Boulder Creek Trail – Flagstaff Road Scenic Drive loop from Greenlee Wildlife Preserve
05:39
70.6km
1,600m
Mountain biking
Hard mountain bike ride. Very good fitness required. Suitable for all skill levels. The starting point of the route is accessible with public transport.
Last updated: April 27, 2026
Tips
Includes a very steep uphill segment
You may need to push your bike.
After 42.7 km for 814 m
Waypoints
Start point
Bus stop
Get Directions
15.6 km
Boulder Creek Trail
Highlight • Trail
Tip by
20.4 km
Chapman Drive Trailhead
Highlight • Trail
Tip by
20.4 km
Chapman Drive Trail
Highlight (Segment) • Trail
Tip by
36.5 km
Eldorado Canyon
Highlight • Canyon
Tip by
36.9 km
Walker Ranch Loop
Highlight • MTB Park
Tip by
44.2 km
Walker Ranch Loop Trailhead
Highlight • Trail
This property …
Tip by
51.5 km
Flagstaff Road Scenic Drive
Highlight (Segment) • Viewpoint
Tip by
70.6 km
End point
Bus stop
Way Types & Surfaces
Way Types
31.3 km
19.4 km
12.5 km
6.63 km
696 m
131 m
Surfaces
39.9 km
12.5 km
11.1 km
6.37 km
725 m
< 100 m
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Elevation
Highest point (2,380 m)
Lowest point (1,610 m)
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Weather
Powered by Foreca
Thursday 25 June
23°C
14°C
81 %
Additional weather tips
Max wind speed: 10.0 km/h
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Our route recommendations are based on thousands of hikes, rides, and runs completed by other people on komoot.
Description
If you're looking for a truly epic and demanding mountain biking adventure near Boulder, the Boulder Creek Trail – Flagstaff Road Scenic Drive loop from Greenlee Wildlife Preserve delivers. This difficult 43.8-mile (70.6 km) route packs in a massive 5265 feet (1605 metres) of climbing, taking around 5 hours and 38 minutes to complete, making it a serious test for riders with a very good level of fitness who are ready for varied terrain and significant elevation.
What to expect on Boulder Creek Trail – Flagstaff Road Scenic Drive loop from Greenlee Wildlife Preserve
The journey starts on the paved Boulder Creek Path, but don't let that fool you; it quickly transitions to packed gravel and unpaved mountain roads. You'll soon find yourself tackling the steep and twisty Flagstaff Road, with grades up to 15%, as you climb towards Flagstaff Mountain. The reward for your effort is sweeping views of the snowcapped Indian Peaks and Rocky Mountain National Park, framed by dense ponderosa pines and dramatic rock outcroppings. Keep an eye out for mule deer and other wildlife. Chapman Drive, a car-free unpaved section, offers a challenging climb, but be aware it can be tough when wet. This route is for experienced mountain bikers who thrive on sustained ascents and diverse terrain.
Planning your visit
This loop starts from the Greenlee Wildlife Preserve, which offers a peaceful natural environment and wildlife viewing opportunities before you hit the trails. While the route is accessible, be prepared for the significant physical demands, especially the immediate and sustained climb up Flagstaff Mountain. Chapman Drive, a key unpaved section, is closed to vehicles, offering a unique car-free climbing experience. Given the difficulty and duration, ensure you carry plenty of water and nutrition, and check weather conditions, especially for rain which can make Chapman Drive particularly challenging.
Trail details
- Distance: 43.8 miles (70.6 km)
- Elevation gain: 5265 feet (1605 metres)
- Difficulty: difficult
- Estimated time: 5 hours and 38 minutes
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