Pathfinder Reservoir

 

                                    

Pathfinder Reservoir, nestled in the rugged landscapes of southern Natrona and Carbon counties in Wyoming, is a striking blend of history, engineering, and outdoor recreation. Created by the monumental masonry Pathfinder Dam, this reservoir sits about 47 miles southwest of Casper on the North Platte River, boasting 117 miles of shoreline and over 1,016,000 acre‑feet of storage capacity.

A Legacy of Engineering

Constructed between 1905 and 1909, Pathfinder Dam is built from granite quarried from local canyon walls, featuring solid-faced blocks over 24–36 inches thick atop a core of massive, irregular stones. At completion, the total cost exceeded $2.5 million, a notable accomplishment given its rugged remote location Named in honor of explorer John C. Fremont—“the Pathfinder of the West”—the dam is listed on the National Register of Historic Places.

Today, the Pathfinder Interpretive Center, housed in the original dam tender’s residence, preserves this remarkable history. Nearby, a 1.7‑mile interpretive trail—accessible via historic suspension bridge or from the dam itself—provides sweeping views and educational signage.

Recreation & Fishing

Pathfinder Reservoir is revered for its blue‑ribbon fishing, drawing anglers’ year‑round. Stocked annually with rainbow and cutthroat trout, the reservoir also offers brown trout, people’s favorite Ohrid trout, perch, and trophy-caliber walleye. Locals and visitors especially converge each January for the HAWG Ice‑Fishing Derby, a highlight of winter recreation.

Recreation is supported by three campgrounds and three boat ramps, with facilities managed through the Bureau of Reclamation in partnership with Natrona County and the BLM Visitors can launch boats, bank fish, or enjoy tranquil canoe paddles across this scenic water body.

Wildlife & Natural Beauty

Much of the reservoir is encompassed by the Pathfinder National Wildlife Refuge, covering over 16,800 acres and managed by the U.S. Fish & Wildlife Service. The refuge borders portions of the reservoir and provides habitat for migratory birds, pronghorn, and other wildlife across wetlands and grasslands.

Visiting Tips

• Access: Via U.S. Highway 220 to County Roads 408 or 410, about a 10‑minute drive from Alcova Reservoir.
• Amenities: Campgrounds—including the reservation-based Diabase Campground—boat ramps, marina facilities, restrooms, and interpretive trail access.
• Climate: Arranged in a cold semi‑arid climate with wide seasonal swings ranging from over 100 °F in summer to potentially −39 °F in winter.
• Regulations: Wyoming fishing license required. Daily limits typically include up to six trout (combined species), with only one permitted over 16 inches.

Conclusion

Whether you are a history buff drawn to the dramatic masonry of Pathfinder Dam, an angler chasing trophy trout and walleye, or a nature lover seeking expansive birdlife and scenic solitude, Pathfinder Reservoir offers an unforgettable Wyoming experience. From educational trails and historic sites to wide-open waters and wildlife-rich landscapes, this reservoir continues to stand as a testament to early western ingenuity—and modern outdoor enjoyment.

Let Wild West Curations help you plan the perfect camping trip, fishing adventure, or visit to nearby attractions!

*Pictured owned and taken by Becky Taylor*