County Road 23 is a county route that serves the cities of Stillwater and Oak Park Heights. County Road 23 begins as Stagecoach Trail at County Road 21 in Oak Park Heights. 23 turns into 59th Street before turning onto Beach Road at its intersection with 60th Street (Washington County 26). County 23 then continues onto Paris Avenue before turning onto Orleans Street in Stillwater. County Road 23 turns again onto Third Street South and then onto Chestnut Street East as it enters downtown Stillwater, where it ends at Main Street (MN 95). County Road 24 serves the cities of Stillwater and Oak Park Heights, as well as Baytown Township. County Road 24 begins at 47th Street North (Washington County 14) in Baytown Township, near the unincorporated town of Siegel. County Road 24 is known as Osgood Avenue and has a major intersection at Minnesota 36 in Oak Park Heights, before entering Stillwater. County Road 24 turns onto Orleans Street in Stillwater, but after only one block, 24 ends at County Road 23. County Road 25 runs along the western boundary of Washington County as Century Avenue. County Road 25 begins at the interchange between Interstate 94 and Minnesota 120 near the town of Landfall. County Road 25 runs south before ending at an intersection between Century Avenue and Lake Road. County Road 25 is concurrent with Ramsey County 72 for its entire route. County Road 26 is a county route that serves the city of Oak Park Heights. 26 begins at Osgood Avenue (Washington County 24) just south of an intersection with Minnesota 36. County Road 26 goes east for about half a mile before ending at Beach Road (Washington County 23). County Road 27 is a county route that serves Mahtomedi, White Bear Lake, and Birchwood Village in Washington County. County Road 27 forms part of the western border of the county. County Road 27 begins at an intersection between Minnesota 120, Minnesota 244, and Ramsey County 15. County Road 27 goes north until in crosses the border into Ramsey County, just south of White Bear Lake. County Road 27 is named East County Line Road for its entire route. County Road 27 is signed with a white square rather than the standard pentagon shown on the map of Washington County. County Road 29 is a county route that was formerly numbered as County Road 36. County Road 29 begins at an interchange with Minnesota 36. 29 goes north into Mahtomedi before ending at Stillwater Road (Washington County 12).