The Director of the Intermountain Region, National Park Service (NPS), signed a decision document earlier this summer that enabled Rocky Mountain National Park (RMNP) to conduct repairs to the Alluvial Fan, Ypsilon Lake, and Lawn Lake Trails that were damaged in the September 2013 flood. Repair work has already begun on some sections. It will be a few years before the reroutes and repairs are completed on all three trails.
The NPS selected Alternative B, Establish and Maintain a Travel Route (the NPS preferred alternative) for the Alluvial Fan, Ypsilon Lake, and Lawn Lake trails because the alternative best met the purpose and need for the project as well as the project objectives. A description of the selected action for the three trails follows.
Lawn Lake Trail – A new trail is being constructed around the four trail sections damaged or washed out, and limited improvements will be made to an existing informal trail. Trail tread will be about 3 feet wide, with trail clearing limits 6 feet wide by 10 feet high. Pedestrian and equestrian use will be allowed.
Ypsilon Lake Trail –A new timber foot bridge has been constructed across the Roaring River. New trail approaches on either side of the river are being constructed, with a trail tread about 3 feet wide, and trail clearing limits approximately 6 feet wide by 10 feet high. Pedestrian and equestrian use will be allowed on the trail, but equestrian use will not be allowed on the bridge, instead a horse stream crossing will be established.
Alluvial Fan Trail – A new accessible trail will be constructed between the existing east and west parking lots with a new bridge across the Roaring River. An accessible overlook trail to Horseshoe Falls will be constructed. A 150-foot portion of the accessible trail will extend into designated wilderness to reach the overlook. The trail tread will be about 5 to 6 feet wide, with trail clearing limits approximately 8 feet wide by 8 feet high. Only pedestrian and accessible use will be allowed.