🏆🏆🏆🏆 Northern Prairie Oasis — Wooded lake in the treeless northern prairie — a surprising oasis of timber in the Great Plains
Lake Hiddenwood Recreation Area is an oasis of woodland surrounding a 63-acre lake in Walworth County — remarkable because this part of north-central South Dakota is otherwise treeless prairie. The “hidden wood” that gives the lake its name is a natural grove of elm, ash, and cottonwood in a sheltered valley — trees that survive here only because the terrain protects them from the relentless prairie winds. Early settlers prized these rare timber groves for firewood and building material. The area lies near the historic Yellowstone Trail — America’s first transcontinental highway (1912).
Visitor Information
| Detail | Information |
|---|---|
| Location | Walworth County, SD |
| Entry Fee | SD Park Entrance License required |
| Lake | 63 acres — hidden woodland! |
| Near | Yellowstone Trail — 1st US highway 1912! |
About Lake Hiddenwood
Lake Hiddenwood Recreation Area in Walworth County provides lake recreation near Selby in north-central South Dakota. The lake is “hidden” in a wooded draw on the Missouri Plateau — a surprise of trees and water in the otherwise open grassland. The area provides a scenic oasis in the prairie landscape.
Things to Do
Fishing for bass, northern pike, and bluegill, camping (40 sites), swimming, hiking, and enjoying the hidden oasis of trees and water in the northern prairie.
Insider Tips
Hidden gem: Lake Hiddenwood is a small prairie lake surrounded by cottonwood groves — the “hidden wood” in an otherwise treeless landscape. Pro tip: Trees on the Great Plains grow only along waterways — these riparian corridors provide crucial wildlife habitat and shelter. Cottonwood: The plains cottonwood was the most important tree on the prairie — providing shade, building material, and horse feed (Native Americans fed cottonwood bark to horses in winter).
Best Time to Visit
Summer: Lake swimming and fishing. Fall: Cottonwood golden foliage. Spring: Migrating birds. Winter: Quiet prairie solitude.
Frequently Asked Questions
Why were cottonwood trees so important?
On the treeless Great Plains, cottonwoods along river bottoms were vital — they provided the only shade, wood for building and fuel, and landmarks for navigation. Native Americans fed the inner bark to horses during winter when grass was buried in snow. Lewis and Clark noted cottonwoods as a sign of water. The trees grow fast (3-5 feet per year) and can reach massive size — some historic cottonwoods exceeded 100 feet tall.
More parks nearby: Swan Creek Recreation Area is a short drive away, while Little Moreau Recreation Area lies within about an hour’s drive.
Camping reservations: Book campsites and cabins for South Dakota state parks online at reservations.gooutdoorssouthdakota.com.
