Tuttle Creek Lake is a 15,800-acre U.S. Army Corps of Engineers reservoir on the Big Blue River in Pottawatomie and Riley counties in northeastern Kansas — one of the largest lakes in Kansas and the primary recreational boating destination for the Manhattan and Kansas State University corridor in the Flint Hills. The lake sits approximately 5 miles north of Manhattan, making it the most accessible large reservoir to a major Kansas university market and drawing consistent boating traffic from the KSU community alongside the established Riley and Pottawatomie County residential boating population. The Big Blue River arm and the lake’s creek tributaries produce walleye, largemouth and smallmouth bass, crappie, white bass, and channel catfish fishing managed by the Kansas Department of Wildlife and Parks. Tuttle Creek State Park on the lake’s eastern shore provides marina facilities, boat launch access, and camping. Find Boat Services lists verified boat repair, motor service, electronics installation, trailer repair, and winterization providers serving Tuttle Creek Lake within 35 miles across Riley, Pottawatomie, and Marshall counties.