Background

Alluvial Fan Trail: A Geological Wonder

Explore a unique landscape shaped by the dramatic 1982 Lawn Lake flood in Rocky Mountain National Park.

4.8

The Alluvial Fan Trail in Rocky Mountain National Park offers a short, accessible hike to a dramatic landscape shaped by the 1982 Lawn Lake flood. This natural disaster transformed the area, leaving behind a boulder field and cascading waterfall that tell a powerful story of nature's force.

A brief summary to East Alluvial Fan Trailhead

  • Alluvial Fan Trail, Estes Park, Colorado, 80517, US
  • Visit website

Local tips

  • Arrive early to avoid crowds, as the Alluvial Fan Trail is a popular destination within Rocky Mountain National Park.
  • Wear sturdy shoes if you plan to explore the boulder field and climb on the rocks.
  • Bring a picnic to enjoy by the Roaring River, taking in the scenic views.
  • Check the National Park Service website for any alerts, closures, or timed-entry requirements before your visit.
widget icon

Getting There

  • Driving

    From downtown Estes Park, drive west on US-34, entering Rocky Mountain National Park. Continue for approximately 6.8 miles and turn right onto Old Fall River Road. The East Alluvial Fan Trailhead will be on your right in about half a mile. Parking is available at both the East and West trailheads. Note that a timed-entry permit may be required to enter the park during peak season.

  • Public Transport

    The Estes Park Shuttle provides seasonal service to various locations within Rocky Mountain National Park. Check the shuttle schedule for availability and routes to the Fall River Entrance, from which you can access the Alluvial Fan Trail via Old Fall River Road. From the Fall River Entrance to the Alluvial Fan Trail, consider using a ride-sharing service or taxi for the final few miles. Shuttle fare is around $6 - $10. A taxi or ride-share may cost approximately $15 - $25 for the short distance.

  • Walking

    From the Fall River Entrance to Rocky Mountain National Park, it is approximately 3 miles to the Alluvial Fan Trail along Old Fall River Road. This is a scenic but lengthy walk. Be prepared for potential wildlife encounters and changing weather conditions. Ensure you have adequate water and sun protection. There are no fees for walking, but a park pass might be required to enter the park.

Unlock the Best of East Alluvial Fan Trailhead

Buy tickets

    No tickets available

Book tours with entry

    No tours available

Book tours without entry

    No tours available

Discover more about East Alluvial Fan Trailhead

The Alluvial Fan Trail provides visitors with an opportunity to witness the lasting impact of a natural disaster. In July 1982, the Lawn Lake Dam failed, sending over 200 million gallons of water surging down the Roaring River. This catastrophic event created the Alluvial Fan, a 42-acre area characterized by a large boulder field and a scenic waterfall. The trail itself is a short, paved path that is accessible to hikers of all abilities. From the East Alluvial Fan Trailhead, the trail gradually ascends toward the fan, offering views of Horseshoe Falls and the Mummy Range. Interpretive signs along the way explain the geological formation and the history of the flood. Visitors can explore the boulder field, climb on the rocks, and enjoy the cool water cascading down. Alternatively, the West Alluvial Fan Trailhead provides another access point to the Alluvial Fan. This route meanders along the Roaring River and crosses a 56-foot bridge, connecting to the east side of the fan. The west side also offers a restroom and picnic tables, making it a convenient option for families.

Popular Experiences near East Alluvial Fan Trailhead

Popular Hotels near East Alluvial Fan Trailhead

Select Currency