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Fourth Connecticut Lake Preserve

Nestled just below the ridgeline that separates New Hampshire from Quebec, Fourth Connecticut Lake marks the humble beginnings of New England's longest river!
Trail Activity
Walking Hiking Snowshoeing
1.70 miles, Loop
Pittsburg (NH)
Packed Earth/Dirt, Rock/Ledge, Boardwalk/Bog Bridging
Not Permitted


The 1.7-mile loop trail starts west of the parking lot next to the border crossing station. The first half mile is steep, rocky, and wet in sections before it turns left and drops down to the shore of the Lake. Upon reaching the water, turn either right or left to follow the loop trail around the Lake.  At the southern end of the pond, you'll cross a small stream that marks the very beginning of the Connecticut River! Continuing around the pond will bring you full circle back to the main trail leading back to US-3. This Preserve is managed by The Nature Conservancy, and is an excellent place for walking and observing wildlife. Camping, fires, pets, or wheeled vehicles are not permitted on the Preserve. Click here for a trail brochure and more information.

Other Information

This natural area is open to the public for recreation and education. Please, for the protection of this area and its inhabitants, and for everyone's enjoyment:

  • Foot travel only
  • No pets
  • Please carry out trash
  • No removal or destruction of plants, wildlife, or minerals.
  • No camping or open fires
  • No hunting, trapping, or fishing.

Trail Manager

The Nature Conservancy is a global non-profit conservation organization. Our mission is to conserve the lands and waters on which all life depends.

The Nature Conservancy in New Hampshire has been safeguarding our state's most precious natural resources since 1961, conserving 290,000 acres of forests and files and 680 miles of river and estuary shoreline. Our preserves are open for hiking, fishing, skiing, hunting, and wildlife viewing. Learn more at:

The Nature Conservancy in New Hampshire

The Nature Conservancy in New Hampshire
22 Bridge Street, 4th Floor
Concord, NH 03301
Phone: (603) 224-5853
View website

Trail Tips

Plan Ahead and Prepare
Find out about and follow any local regulations and respect landowners’ property.
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Trailhead Information

From the village of Pittsburg, take US-3 north 22 miles to the US/Canada border. Park at the parking sign on the east side of US-3 (across from the U.S. Customs station). To reach the trail, walk north from the parking area along the right (east) side of the border station fence, then cross over to the west side of the highway. Please note that you do NOT need to check in at the border station before hiking.

Click on a parking icon to get custom directions
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