Lake Carmi, with a 1375-acre surface area, is the fourth largest natural lake entirely within Vermont. It is 7.5 miles around, averages about 20 feet deep, and is 33 feet at the deepest point. The lake supports northern pike, walleyes, and other warm water species. Water from the lake drains north into Quebec's Pike River then into Lake Champlain. Lake Carmi was once much larger. In the thousands of years since the last ice age cleaned it out, the southern end of the original lake has filled in with silt and vegetative matter to create wetland forests and the third largest peat bog in Vermont.
While paddling on Lake Carmi, you might see a bald eagle or osprey. As you paddle around the lake you will notice a many and varied display of lakeshore cottages and cabins. Most of the shoreline is privately owned, and except for the park frontage on the south shore and a public launch ramp on the north end, there are few places to stop for a break along the shore.
The state park includes more than two miles of lake frontage on the southeast shore of Lake Carmi. A140-acre bog lies within Lake Carmi State Park and is a designated State Natural Area. Some of the land is under an agricultural lease so the open fields are maintained by farming activity.
There are 140 tent/trailer sites, 35 lean-to sites, and 2 cabins that make this the state's largest campground. Rest rooms have running water and hot showers($). There is a trailer dump station but no hookups. Most sites are large enough to accommodate self-contained RVs. There are swimming beaches in both camp areas. There is also a day use beach with a nature center, rest rooms and rental boats.