MTB Project Logo

green Rocky Flats NWR North

  1.0 ( 2 ) Favorite

Navigate on-trail with our free app

iOS App Store Android App Store


6.5 mile 10.4 kilometer loop
0% Singletrack


Ascent: 253' 77 m
Descent: -252' -77 m
High: 6,075' 1,852 m
Low: 5,894' 1,797 m


Avg Grade: 1% (1°)
Max Grade: 8% (5°)


No Dogs
Driving directions Take a virtual tour
Zoom in to see details
Map Key

Trail shared by Scott Edlin

Flat, short, and easy doubletrack in a historic area.

Scott Edlin

E-Bikes Unknown

Features -none-

There may be protesters at the trailhead but the ones I encountered were friendly. Designated trails, roads, and parking areas are open to visitor access from sunrise to sunset, seven days a week, and are open most federal holidays (closed on Thanksgiving, Christmas, and New Year's Day).


The trails on this ride will not be a challenge for even a beginner rider. However, the views are interesting, as is the history and controversy over public access. It's not a destination ride, but if you are already in the area it's worth checking out once. It can be extended by continuing further south on the Rocky Mountain Greenway.

Need to Know

There is a toilet at the trailhead. There may be potential protesters and the Refuge could close due to legal challenges. Don't drink the water or dig for treasure. You might find it. Rules and regs here. History and info here.


Start at the signed new wide doubletrack just beyond the main signage heading south on the south side of the Walnut Creek Loop. Dodge cactus and yucca along the primitive doubletrack as it bends to the west and meets up with the north half of the Walnut Creek Loop. The doubletrack gently climbs and gradually improves to smooth rock as it follows the Rock Creek gully up on the mesa.

Pass through a fence (no gate) and continue to the signed east side of the Lindsay Ranch Loop. Buckle your helmet and prepare for a refreshing descent to the creek and the Lindsay Ranch. Check out the barn and water up for a grind back up onto the mesa between the ranch and the NREL National Wind Technology Center. There are nice views of the gigantic turbines, Eldorado Mountain, and the Continental Divide and the Indian Peaks beyond.

Continue on the doubletrack as it winds south and then climbs back up the main road. You could continue south at the junction if you haven't had your fill. Make a left and work back to the east junction with the Lindsay Ranch Loop. Backtrack towards the trailhead on the doubletrack. If you miss the junction at the west end of the Walnut Creek Loop, you'll take the north side of it back to a gate at the trailhead. Greet the friendly protesters and dump some water on your head.

History & Background

Portions of the Refuge surround a historic Cold War site. For nearly four decades, thousands of women and men worked at the Plant, building weapons components for the United States' nuclear weapons arsenal. In 1989, operations ended and the Rocky Flats Plant was added to the U.S. Environmental Protection Agency's Nation Priorities List or sites that needed to be cleaned up.

Beginning in 1992, many of the same Cold War veterans who had built weapons components at the Plant assisted with an unprecedented and enormously complex Comprehensive Environmental Response, Compensation, and Liability Act ("Superfund") cleanup project to investigate and remediate the site.

More info here.


Rate This Featured Ride

Rate Quality

   Clear Rating

Rate Difficulty

Share This Ride

Check In


Oct 13, 2018
Simpy San

Trail Ratings

  1.0 from 2 votes


  1.0 from 2 votes
5 Star
4 Star
3 Star
2 Star
1 Star


in Colorado


124 Views Last Month
909 Since Sep 15, 2018
Easy Easy

Scott Edlin
boulder, co
Scott Edlin   boulder, co
Meh. Sep 15, 2018

MTB Project is part of the REI Co-op family,
where a life outdoors is a life well lived.

Shop REI Mountain Bike

MTB Project is supported by

Support Your Local IMBA Chapter