Posted on August 17, 2021 and last updated on August 17, 2021

Lost Pond Trail, Foss and Knowlton Trail, and Grassy Pond Trail, Baxter State Park


  • Preserve Size: 209,644 acres
  • Trail Mileage: ~8.3 miles
  • Pets: no
  • Difficulty: easy to moderate
  • Sights: Blueberry Ledges, remote ponds

Lost Pond Trail/Foss and Knowlton Trail/Grassy Pond Trail in red; Blueberry Ledges Trail in blue

Foss and Knowlton Trail is a mostly level trail, about 5.4 miles long, that is a continuation of Lost Pond Trail (about 1 mile). It connects to the Appalachian Trail. We made a big loop from Blueberry Ledges Trail to Foss and Knowlton/Lost Pond/Grassy Pond trails for a 13-mile loop in a relatively flat section of the park. Along the way you can check out two remote ponds—Lost Pond and Foss and Knowlton Pond—as well as the spectacular Blueberry Ledges.

Coming from the south, Foss and Knowlton Trail starts out on a wide gravel path for the first 2.3 miles, with a gradual incline for some of it. The trail narrows only when you reach Foss and Knowlton Pond. At this point, the walking becomes a touch rougher. It’s flat, but it’s rocky and rooty. The moss-covered rocks on the Lost Mountain Trail make the forest floor look like a green, bumpy carpet.

Directions: You can park at Katahdin Stream Campground and cross Tote Road to Grassy Pond Trail. This connects with Daicey Pond Trail. In 0.2 miles you’ll come to Lost Pond Trail, which feeds into Foss and Knowlton Trail. All the trails are well signed and well blazed. From the south, you can pick up the Foss and Knowlton Trail from Abol Bridge Campground.


Let me know if you have any trail updates or corrections!