The William C. O'Neill Bike Path (also called the South County Bike Trail) is a paved rail trail extending from Kingston station parking lot in West Kingston, Rhode Island, to Mumford Road in Narragansett, Rhode Island.

[2] In 1981, Anthony Guariello—a local mill owner and town councilman—purchased the line with the possibility of conversion into a bike path for school children.

Phase III, started in 2009, and opened in 2011, extended the trail a further 0.8 miles (1.3 km) (including a short section on a residential street) to the intersection of Mumford Road and Riverside Drive in Narragansett.

Instead, Phase IV will be routed through the Canonchet Farm, a local park, and reach the waterfront north of where the railroad did.

[7] A bond approved by RI voters in 2016 provided $10 million in funding to various bike path projects throughout the state.