Stretching twelve miles along the base of the Wind River Range, Fremont Lake is Wyoming's deepest natural body of water. Carved by glaciers, its cold, clear depths reach over 600 feet, drawing sailors, anglers, and paddlers to its windswept alpine waters.
Fremont Lake, located just over three miles northeast of Pinedale, is a massive body of water created by ancient glacial action. Carved out during the Bull Lake and Pinedale glaciations, this deep granitic trough is dammed at its southern end by a terminal moraine, trapping the cold, clean runoff from the Wind River Range. Measuring roughly twelve miles long and up to a mile wide, it ranks as the second-largest natural lake in Wyoming. It is also the state's deepest body of water, plunging to a maximum depth of 607 feet. This extreme depth makes it the seventh-deepest lake in the continental United States, with a cold, oligotrophic environment that supports a thriving fishery of lake trout, rainbow trout, brown trout, and kokanee salmon.
The human history of the lake is intertwined with the era of the Rocky Mountain fur trade. In the 1830s, Scottish adventurer Captain William Drummond Stewart, often considered Wyoming's first modern tourist, frequented the lake alongside legendary mountain man Jim Bridger. Stewart was so taken by the waters that he brought artist Alfred Jacob Miller to paint them in 1837, and later returned in 1843 with an India-rubber boat to explore the northern reaches. During this era, the water was known as Stewart's Lake or Loch Drummond. It was later renamed in honor of explorer John C. Fremont, who mapped the Oregon Trail region in 1842 and climbed a nearby peak, though historical sources indicate he never actually set foot on the lake's shores.
Today, the lake serves as a municipal watershed for Pinedale and a center for high-altitude recreation at 7,400 feet. On the southeast shore lies Sandy Beach, a popular day-use area lined with aspen trees where shallow, sun-warmed waters provide a rare swimming spot in the otherwise icy lake. Nearby, the CCC Ponds Recreation Area offers a series of quiet wetlands and interpretive trails ideal for spotting moose, osprey, and bald eagles. Along the southern shoreline, Lakeside Lodge Resort and Marina operates under a US Forest Service permit, offering cozy log cabins, a full-service marina with boat rentals, and a deck restaurant where visitors can watch the afternoon winds kick up whitecaps. These reliable mountain gusts also make the lake a premier destination for sailing, culminating in the annual Fremont Lake Sailing Regatta held each August.
Afternoon winds on Fremont Lake frequently generate sudden, choppy swells that are ideal for sailing but hazardous for small watercraft. Plan paddleboarding or kayaking excursions for the calm, glassy hours of the early morning, and always wear a life jacket in these cold, 600-foot-deep waters.