South Twin Lake is part of the Twin Lakes Recreation Area managed by the Bureau of Land Management in Washington state. Located at the south end of Upper Twin Lake, this serene setting offers opportunities for paddling and fishing. The lake is stocked with rainbow trout, largemouth bass, yellow perch, yellow bullhead, black crappie, and sunfish, making it popular among anglers.

Access to South Twin Lake is via an access road about two miles long. Paddlers can launch from the recreation site at the south end of the lake. The area provides a few primitive campsites for those wishing to stay overnight.

The surrounding landscape features shrub-steppe uplands and wetlands, providing habitat for numerous bird species. Paddlers may spot waterfowl and other wildlife while exploring the lake. In spring, bright yellow balsam root flowers are abundant, adding color to the scenery.

Beyond paddling and fishing, visitors can enjoy hiking trails that wind through the uplands and upper Lake Creek Canyon. The developed wetlands north of the lakes invite exploration for those interested in birdwatching or photography.

The Twin Lakes Recreation Area originated from gravel excavation for the construction of Interstate 5. The two rectangular-shaped lakes have since evolved into a popular 44-acre park. This unique origin gives the lakes their distinctive shape and layout.

When planning a trip, be aware that restrooms typically close for the winter immediately after Labor Day weekend, with portable toilets available until facilities reopen in spring. Paddlers should check for any toxic algae alerts before visiting, as water quality can vary seasonally.

While specific paddling routes are not outlined, the lake's rectangular shape and relatively small size make it suitable for leisurely exploration. The calm waters and scenic surroundings provide an enjoyable paddling experience for both beginners and experienced paddlers alike.