The Icla de Silva Foundation hosts its annual 5k run/walk in support of bone marrow transpants in Chestnut Hill. The course is a chip-timed double loop around Chestnut Hill Reservoir, on a gravel path. There is a small incline at the start/finish, but otherwise it is a level course. Donations will go to support The Icla da Silva Foundation's mission of saving lives by recruiting potential bone marrow donors to the Be the Match Registry, and by providing support services to patient in need of a bone marrow transplant.