Alltrails.com describes the trail as a 3.1 mile heavily trafficked loop trail located near Lincoln, NH that features a lake and is rated as moderate. Lonesome Lake is located in the Franconia Notch State Park, which is in the very heart of the White Mountains National Forest. The trail head is located in the Lafayette Place Campground, and parking is limited so getting there either early in the day, late in the afternoon, or on a weekday is most advisable. At the top of the trail you'll find the Lonesome Lake Hut, operated by the AMC (Appalachian Mountain Club). Reservations for overnight stays range from $74 per night for a member child aged 3-12 to $167 per night for a non member adult. Your stay includes a fantastic home cooked breakfast and dinner. The trail is fairly well marked with yellow blazes, and includes both a white, and blue blaze section of the Appalachian Trail.