ORTA Mission Statement is "To build and maintain a public hiking trail system on the Oak Ridges moraine, off-road where possible, and To organize and promote hiking on this trail system, and To encourage responsible stewardship of the Moraine's natural environment."
In 1991, a group of volunteers gathered through the cooperation of STORM (Save the Oak Ridges Moraine), the Metro Toronto and Region Conservation Authority and Hike Ontario.
These volunteers developed the idea of a system of public recreational trails along the full length of the moraine, from Albion Hills in the west, to the Northumberland Forest in the east.
In the past grants were received from the Oak Ridges Moraine Foundation and Ontario Trillium Foundation Ontario's 2005 Greenbelt Act and associated Greenbelt Plan have brought a measure of financial assistance to attempts to preserve the environmental integrity of this natural resource.
Funds are also derived from the memberships annual dues and their signature event Moraine Adventure Relay via team entry fees.