Flagstaff Road Scenic Drive – Gross Reservoir loop from Flagstaff Mountain

Flagstaff Road Scenic Drive – Gross Reservoir loop from Flagstaff Mountain

Hard

3.5

(15)

riders

Flagstaff Road Scenic Drive – Gross Reservoir loop from Flagstaff Mountain

05:01

75.3km

1,790m

Road cycling

Hard road ride. Very good fitness required. Some segments of this route may be unpaved and difficult to ride. The starting point of the route is right next to a parking lot.

Last updated: September 23, 2026

Tips

The surface along some of this route may not be suitable

Some segments of your route comprise a surface that may not be suitable for your chosen sport.

After 16.4 km for 9.23 km

After 71.2 km for 625 m

After 71.9 km for 1.08 km

After 73.0 km for 374 m

Waypoints

Start point

Parking

Get Directions

2.75 km

Flagstaff Road Scenic Drive

Highlight (Segment) • Viewpoint

The road up Flagstaff from Chautauqua to Chapman Drive, where you can continue to Artists Point overlooking Boulder, is an iconic Boulder climb. This fun, twisting road (whether you ride …

Tip by

16.6 km

Gross Reservoir

Highlight • Lake

Gross Reservoir is a large lake on the other side of Flagstaff Mountain. There is a hard-packed gravel road on it's eastern shore which is a great place to snap …

Tip by

16.7 km

Gross Dam Road (Gravel)

Highlight (Segment) • Trail

Gross Dam Road is a mostly-smooth, hard-packed gravel road that connects Flagstaff Road to Coal Creek Canyon Highway. This scenic road sees very little traffic and there are great marked …

Tip by

52.4 km

Barker Reservoir

Highlight • Lake

Barker Reservoir is at the top of Boulder Canyon Drive just outside of the small town of Nederland. This is a great place to catch your breath after the long climb up the canyon and snap some photos.

Tip by

53.4 km

Boulder Canyon Drive

Highlight (Segment) • Climb

After transitioning from the bike path (if you choose to do the initial section of Boulder Canyon Drive on it) the road steadily steepens as you climb up toward Nederland. …

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71.2 km

Boulder Creek Path (Boulder Canyon)

Highlight (Segment) • Cycleway

Although many road cyclists prefer to ride on the narrow, twisting, and well-trafficked road, the recently re-opened Boulder Creek Path, which takes you up to Chapman Drive, is an excellent …

Tip by

75.3 km

End point

Parking

Way Types & Surfaces

Way Types