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OUTDOORBLUEPRINT

Alluvial Fan Hike

0.6

Miles

0.75

Hours

6/10

Quality

2/10

Difficulty

110

Gain (ft)

110

Loss (ft)

On July 15th, 1982, a few miles upstream along the Roaring River, the Lawn Lake dam burst. 29 million gallons of water were suddenly released. The surge of water tore down the steep 4 mile valley, picking up huge boulders and debris along the way. The water hit Horseshoe Park less than one hour after the dam broke, then continued through Aspenglen Campground and into Estes Park, as people fled the oncoming torrent.

Alluvial Fan Hike Map Alluvial Fan Hike Elevation Profile

The Alluvial Fan is a reminder of the awesome power water has to shape the landscape. Today, this easy hike is a popular destination when journeying up Fall River Road, and is well worth the stop.

Approach the waterfall at Alluvial Fan from either the west or the east. Large parking lots are located roughly a quarter-mile away on either end on the north side of Fall River Road. These trails used to be handicap accessible, but a recent flood in 2013 whipped them out. Now, it's a short but rugged hike to the falls area. The trail crosses Roaring River just below a beautiful waterfall. There are many places to safely negotiate the crossing. While this could be a very quick stop, it’s easy to spend multiple hours exploring up the river, having lunch, or just playing in the water. This is a great spot for families that want to see some of the park while having space for kids to play.

The Rough East Alluvial Fan Trail

The East Alluvial Fan Trail, recently washed out

The Alluvial Fan

Alluvial Fan and Roaring River

    Directions

  • From Estes Park, head west on US-34 for 5.4 miles. Turn right onto Old Fall River Road and proceed another 0.5 miles. Look for a large parking area on your right, this is the approach for the East Alluvial Fan Hike. Or continue 0.25 miles for the West Alluvial Fan trailhead.

    Permits & Fees

  • $25 : Rocky Mountain National Park Entrance Fee

    Landmarks

  • 0.0 : East or West Alluvial Fan Parking Lot
  • 0.3 : Roaring River
  • 0.3+ : Up Stream Exploration

    Season

  • June - October
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