An ascent of Allen is a major undertaking since it is a nearly 20 mile roundtrip, nearly half of which is on unmarked trails. The views from Allen are quite good and the final climb is rather enjoyable with outstanding views that progress as you get higher, but this hike is only for the most experienced.
This Adirondack 46 High Peak is number 26 on the list.
This is an approximate 9-mile hike, one way to the summit of Allen. From the trailhead you will descend a bit to a bridge crossing of the Hudson River. After a short walk through an attractive forest you will come to Lake Jimmy and a sharp left turn for a new bypass that avoids the not-so-good floating bridge. Much of the hike will bring you along a state trail that follows not only foot trails but old woods roads and even a gravel road or two. There is now a bridge over the Opalescent River, ending the need to wade.
At 5 miles go right on a plain but unmarked trail, often referred to as a "herd path". The herd path is very apparent and is the most attractive portion of the route. As you approach the top and start following Allen Brook the terrain gets much steeper. Along Allen Brook there is a slide that can be climbed, but care is needed as it is very slippery – a rough herd path on the side will avoid the exposed rock. The summit is treed but off to the side there is an opening or two to take in excellent views of the area.
Trailhead: Leave Lake Placid on Rte 73, follow Rte 73 toward Keene. Drive through Keene and Keene Valley and proceed back to I87. Head south on I-87 and get off exit 29 and follow the Blue Ridge Road (CR 84) toward Newcomb. Continue for roughly 18-miles to the Tahawus Road (CR25) on the right. Follow this road for 6.3 miles and then left at a junction for another 3 miles to a trailhead on the right.
Distance: 18 miles round trip
Elevation: 4,340 feet
Ascent: 2,540 feet