Tonn Lake   Be the first to submit input for Tonn Lake. If you have info on Tonn Lake, Washington County, Texas please submit it here to improve this web site.          These outdoors activities are available near Tonn Lake.   Lakes Near Tonn Lake: Lange Lake, Washington County, 3 miles away Somerville Lake, Burleson County, 14 miles away   Marinas On or Near Tonn Lake: Lake Somerville Marina & Campground, Brenham, 12 miles away Big Creek Marina, Somerville, 14 miles away   Camp Grounds Near Tonn Lake: Artesian Park RV Campground, Brenham, 10 miles away   Hotels Near Tonn Lake: Holiday Inn Express Hotel & Suites BRENHAM, Brenham, 6 miles away Hampton Inn & SuitesBrenham, Brenham, 7 miles away La Quinta Inn & Suites Brenham, Brenham, 7 miles away Comfort Suites Brenham, Brenham, 7 miles away Knights Inn Brenham, Brenham, 8 miles away   Hiking Trails Near Tonn Lake: Yegua Creek Park Nature Trail, Washington County, 13 miles away