If you carefully keep your bird records by state, be aware of the location of the New Hampshire-Maine state line and use the appropriate eBird hotspots when you submit checklists. 

Great East Lake is a large water body that spans two states: New Hampshire and Maine. It covers an area of 1,825 acres and has a maximum depth of 102 feet. The lake is shared by the towns of Wakefield, New Hampshire, and Acton, Maine, and is part of the Salmon Falls River watershed. The lake is the farthest upstream of the five headwater lakes of the Salmon Falls River, a tributary of the Piscataqua River. Water from Great East Lake flows out its dam and through the 800-foot Newichawannock Canal into Horn Pond, then into the Salmon Falls River below Horn Pond.

The lake has a public beach and a boat launch for easy access.

The widest part of the lake is in New Hampshire. The lake narrows to the east in Maine, creating the First, Second, and Third basins. Great East Lake is the largest of the Salmon Falls headwater lakes.