20, 1991, the trail officially stretched from Spring Valley in Greene County to the Terrace Park village limit in Hamilton County, across the river from Milford. The trail was extended northward to Xenia later that year and to Springfield in 1998. In 2006, after a protracted, 26-year battle with Terrace Park residents, it was extended southward to Newtown. In the late 2000s, state budget cuts caused portions of the trail to fall into disrepair, resulting in the temporary closure of some wooden bridges and rest areas. However, an organization called the Friends of the Little Miami State Park Group was founded late 2008 to focus attention and finances on critical portions to keep the trail open and make it safer. Most of the bridges within state park boundaries were paved or re-planked in 2009. In 2010, a failed parks levy prompted the Clark County Park District to indefinitely close its stretch of the trail, posting "No Trespassing" signs at park entrances. Because this stretch of trail was partially built with federal funds, the Ohio Department of Natural Resources attempted to force its reopening. The district reopened its parks in April 2011 with volunteer support. Originally designated State Bike Route 1, the Little Miami Scenic Trail was renumbered in 2011 as State Bike Route 1 south of Xenia and State Bike Route 3 throughout. The concurrency from Newtown to Xenia is marked with "⅓" signs. In the 2000s, the Adventure Cycling Association and OKI Regional Council proposed designating the Little Miami Scenic Trail as part of U.S. Bicycle Route 25. However, the Ohio Department of Transportation later planned to designate State Bike Route 1, including the Little Miami Scenic Trail south of Xenia, as USBR 21; USBR 25 would instead follow the Great Miami River Recreation Trail to the west. ODOT formally proposed a USBR 21 alignment to the American Association of State Highway and Transportation Officials in spring 2021, which the committee approved. In 2022, a dedicated bridge opened in Cincinnati, spanning the Little Miami River and connecting the trail to other trails toward Downtown Cincinnati. Current route Xenia made a deal to be the official start of the trail for a donation of land, making the mile markers change from the previous start. For the first to Xenia, the Little Miami Scenic Trail is operated by the Clark County Park District and the National Trail Parks and Recreation District.