AMBLEWAY Wildest hikes

Rocky Flats National Wildlife Refuge

High Plains Trail–Old Rocky Mountain Greenway Trail, 3 sights

14.9 mi · ▲ 737 ft · 5 hr 20 min

High Plains Trail–Old Rocky Mountain Greenway Trail, 3 sights is a 14.9-mile out-and-back in Rocky Flats National Wildlife Refuge near Marshall, CO. It climbs 737 ft. It scores 0/100 on the Ambleway Wildness scale: paved and peopled.

Elevation

0 mi5,778 – 6,132 ft15.2 mi

Getting there

Trailhead: FlatIrons Vista Trail 39.92859, -105.23458
Nearest town Marshall, CO · Official trailhead info (bouldercolorado.gov)
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Directions

AMBLEWAYwww.ambleway.com

High Plains Trail–Old Rocky Mountain Greenway Trail, 3 sights

14.9 mi · ▲ 737 ft · 5 hr 20 min

Elevation 5,777–6,131 ft

Out & Back · Rocky Flats National Wildlife Refuge

Trailhead: FlatIrons Vista Trail · 39.92859, -105.23458

Weather Sep 4: sunrise 6:33 AM · sunset 7:29 PM

Transit-accessible: CO 93 & CO 128 stop 24 m from the trailhead · Parking lot at the trailhead

  1. Start on FlatIrons Vista Trail, heading NE.
  2. 500 ftContinue straight onto High Plains Trail, heading E.
  3. 2.7 miContinue straight onto Rocky Mountain Greenway Trail, heading E.
  4. 4.1 miTurn left onto Old Rocky Mountain Greenway Trail, heading S.
  5. 0.5 miBear right onto Rocky Mountain Greenway Trailc, heading S.
  6. 0.2 miReach High Plains Trail, then turn around and head back the way you came.
  7. 0.2 miBear left onto Old Rocky Mountain Greenway Trail, heading NE.
  8. 0.5 miTurn right onto Rocky Mountain Greenway Trail, heading N.
  9. 4.1 miContinue straight onto High Plains Trail, heading W.
  10. 2.7 miContinue straight onto FlatIrons Vista Trail, heading W.
  11. 50 ftArrive back at the trailhead.

Each distance is the walk from the previous step. Tap a step for a map of its junction.

Trail map, photos and weather for this hike: www.ambleway.com/hikes/high-plains-trail-out-back

Trail surface

55% gravel45% dirt

Weather

Sunrise 6:33 AMSunset 7:29 PM

Good to know

  • Transit-accessible: CO 93 & CO 128 stop 24 m from the trailhead
  • Parking lot at the trailhead

More from FlatIrons Vista Trail Trailhead

Hikes near Marshall, Colorado