5 Geologic Formations in Rocky Mountain National Park That You Shouldn't Miss

December 12, 2021 Myesha Cogley

One of America's premier national parks, it boasts 355 miles of hiking trails.
Restaurants in Rocky Mountain National Park Campgrounds

1. Key Hole Notch

Key Hole Route Longs Peak, Rocky Mountain National Park, CO
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5.0 based on 3 reviews

Key Hole Notch

This opening en route to Longs Peak helps hikers avoid technical climbing and extremely steep conditions.

2. Boulder Field

Rocky Mountain National Park, CO
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5.0 based on 4 reviews

Boulder Field

Point along the Key Hole Route hiking trail up Longs Peak.

3. Alluvial Fan

Old Fall River Rd About 3 Mi West of the Fall River Entrance Station, Rocky Mountain National Park, CO https://www.usgs.gov/media/images/alluvial-fan-rocky-mountain-national-park
Excellent
72%
Good
25%
Satisfactory
2%
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4.5 based on 321 reviews

Alluvial Fan

Reviewed By fv1989 - Windsor, United States

RMNP just posted a press release that major trail work at the Alluvial Fan and Horseshoe Falls will require closing this area beginning on July 27 through September 24, 2020. This area will be closed on weekdays and weekends. Materials and equipment will take up most of the parking on the west side, and the east side parking lot will be closed. The west side parking area will be further limited in September due to an exclosure fence project. This is such a popular area. The planning and trail work has been ongoing and is needed to repair damage and replace trails and the bridge that were destroyed in the September 2013 flood. It is amazing to realize that such a beautiful area was created by and reshaped by devastating floods in 1982 and 2013. I still feel the area was even more beautiful before the 2013 flood. It will be interesting to see the changes when all the trail work is complete. The Google map location shown for the Alluvial Fan area on this TA listing is in the wrong place. I have reported and tried to get that corrected to no avail.

4. First Terrace

Rocky Mountain National Park, CO

This ledge on the way up Petit Grepon is where the technical climbing begins.

5. Second Terrace

Rocky Mountain National Park, CO

Ledge along the route up the Petit Grepon.

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