Shanahan Hill – Bear Creek Greenway loop from National Center for Atmospheric Research
Shanahan Hill – Bear Creek Greenway loop from National Center for Atmospheric Research
2.6
(21)
38
riders
Shanahan Hill – Bear Creek Greenway loop from National Center for Atmospheric Research
01:12
18.9km
180m
Cycling
Moderate bike ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels. The starting point of the route is accessible with public transport.
Last updated: April 26, 2026
Tips
Cycling is not permitted along parts of this route
After 2.99 km for 213 m
After 11.9 km for 60 m
Waypoints
Start point
Bus stop
Get Directions
848 m
Shanahan Hill
Highlight • Viewpoint
Tip by
11.9 km
Trail Closure
Highlight • Trail
Tip by
12.6 km
East Boulder Community Park
Highlight • Rest Area
Tip by
16.2 km
Bear Creek Greenway
Highlight (Segment) • Cycleway
Tip by
18.9 km
End point
Bus stop
Way Types & Surfaces
Way Types
15.4 km
1.85 km
839 m
737 m
< 100 m
< 100 m
Surfaces
14.1 km
2.93 km
1.53 km
291 m
< 100 m
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Elevation
Highest point (1,750 m)
Lowest point (1,620 m)
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Weather
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Today
Sunday 12 July
34°C
17°C
0 %
Additional weather tips
Max wind speed: 16.0 km/h
to get more detailed weather forecasts along your route
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 touring cycling route that combines iconic Boulder climbs with stunning views, the Shanahan Hill – Bear Creek Greenway loop from National Center for Atmospheric Research delivers a rewarding challenge. This moderate 11.7-mile (18.9 km) route packs in 580 feet (177 metres) of elevation gain, taking about 1 hour and 12 minutes to complete, making it a solid workout for experienced riders.
What to expect on Shanahan Hill – Bear Creek Greenway loop from National Center for Atmospheric Research
Expect a varied journey, starting with the well-known NCAR Hill Climb, a significant ascent that rewards you with panoramic views of the iconic Flatirons and the Boulder Valley from its summit. As you continue, the route transitions into the Shanahan Ridge area, winding through lush ponderosa pine forests. Be prepared for varied terrain; while some sections are paved, others, especially around Shanahan Ridge, can be unpaved and technical, potentially requiring a gravel bike or a robust road bike with appropriate gearing. This route is best suited for cyclists seeking a demanding ride and a true 'Boulder challenge'.
Planning your visit
Planning your ride should account for the challenging terrain, particularly if you're on a traditional road bike. The National Center for Atmospheric Research serves as a convenient starting point. While there aren't specific permits or fees mentioned for this loop, always be aware of local regulations and potential wildlife encounters. Good fitness is required for this route, and it's advisable to check weather conditions, especially during shoulder seasons, to ensure a pleasant and safe ride.
- Distance: 11.7 miles (18.9 km)
- Elevation gain: 580 feet (177 metres)
- Difficulty: moderate
- Estimated time: 1 hours and 12 minutes
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