Ted Mathys, state advocate for Environment Missouri (at podium) and other environmentalists urged the National Park Service to protect the Current River in Missouri during a press conference at St. Louis' City Hall on Dec. 13, 2011.
Credit (Véronique LaCapra/St. Louis Public Radio)
Canoes float down the Current River.
Credit (Greg Iffrig/L-A-D Foundation)
Horseback riding is a popular activity in the Ozarks, but horses' waste has been linked to high E. coli levels in the Jacks Fork, the main tributary of the Current River.
Credit (Mark Morgan/University of Missouri)
Heavy use by ATVs and other vehicles has eroded access trails along the Current River.