Lake Weslemkoon is a hidden jewel in the Addington Highlands. It is characterized by a rocky shoreline, with numerous bays and coves. There are abundant islands, many of which are uninhabited or public land and can be used as recreational areas. Notable are the 5 islands, which are a small group of islands in the center of the main body of the lake, and Squaw Point, which is a treeless area where it is said Algonquin Native women and children retreated to during times of battle. This pristine majestic lake carved out of the Canadian Shield is a healthy fishery and a great place to canoe or kayak due to the calm waters and many coves. Wildlife in the area include elk, deer, the common loon, bear, moose, and hundreds of species of birds.
When heading north on the lake from the southern end, a viewer would notice a lighthouse that has stood since the 1920s and, up until the installation of a large orange flashing beacon placed on top of a 55 gallon drum and mounted to a rock, served to mark the narrow entrance into the main body of the lake. The lighthouse cottage has been said to have been visited by Thomas Edison and Henry Ford.