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East Alluvial Fan Trailhead

Explore the accessible trails of the East Alluvial Fan Trailhead, witness the power of nature, and discover stunning views in Rocky Mountain National Park.

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The East Alluvial Fan Trailhead in Rocky Mountain National Park offers an easy, accessible trail to witness the unique geological formations shaped by the 1982 Lawn Lake flood. The short hike provides stunning views of Horseshoe Falls, the Mummy Range, and the Roaring River, making it a memorable experience for all skill levels.

A brief summary to East Alluvial Fan Trailhead

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

Local tips

  • Arrive early, especially during peak season, as parking at the East Alluvial Fan Trailhead is limited.
  • Purchase a timed-entry pass for Rocky Mountain National Park between late May and early October.
  • Bring a camera to capture the stunning views of Horseshoe Falls, the Mummy Range, and the unique geological formations.
  • Stay on marked paths or scramble up the boulder field for adventurous views of Horseshoe Falls.
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Getting There

  • Driving

    From Estes Park, drive west on US-34 (Trail Ridge Road) for approximately 6.8 miles. Turn right onto Old Fall River Road and continue for about 0.5 miles to the East Alluvial Fan Trailhead. Parking is available at the trailhead, but it can fill up quickly during peak season. There is no fee to park.

  • Public Transportation

    During the summer months, take the Estes Park shuttle service to the Bear Lake Corridor. From the Bear Lake stop, walk or hike approximately 1.5 miles south along Bear Lake Road to reach the Alluvial Fan area. Check the shuttle schedule in advance as it may vary. Shuttle fare is free with park entrance.

  • Walking

    If you are already in the Bear Lake area of Rocky Mountain National Park, you can walk to the East Alluvial Fan Trailhead. Head south on Bear Lake Road for about 1.5 miles, enjoying the scenic views along the way. This route is suitable for all fitness levels.

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Discover more about East Alluvial Fan Trailhead

The East Alluvial Fan Trailhead provides access to a remarkable area within Rocky Mountain National Park, showcasing the power of nature and the dramatic reshaping of the landscape. The main attraction, the Alluvial Fan, is a fan-shaped deposit of rock and debris created by the devastating Lawn Lake flood of 1982. This natural disaster occurred when the Lawn Lake Dam broke, sending millions of gallons of water rushing down the Roaring River, carrying trees, boulders, and sediment into the valley. The resulting Alluvial Fan is a testament to this event, with a unique boulder field and impressive views of Horseshoe Falls. The trail from the East Alluvial Fan Trailhead is short, paved, and mostly accessible, making it suitable for families and hikers of all abilities. Though there is a steep section near the parking lot , the path leads to a bridge crossing the Roaring River, offering stunning views of the Mummy Range, Endovalley, and the waterfall. Visitors can explore the effects of the flood, with interpretive signs explaining the formation of the site. The area is also a great spot for wildlife viewing, especially in the early morning or evening. The East Alluvial Fan Trailhead provides an opportunity to witness the beauty that emerged from a pair of disasters, offering a blend of natural history and scenic beauty.

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