RDU Airport and Wake Stone plan to build a quarry on publicly owned land that borders Umstead State Park and the East Coast Greenway. This is one of the most used recreation corridors in the Triangle. There is a better alternative. The Conservation Fund has offered to buy the land — 105 acres known as the Oddfellows tract — from RDU to expand Umstead State Park. The intention is to use the Oddfellows tract and nearby portions of Umstead State Park for singletrack mountain biking and hiking trails.