From their event page:

Join Fairmount Park Conservancy, Men’s Night Run Club, and We Walk PHL for a 4.5-mile trail run or a two-mile walk along West Fairmount Park’s historic Trolley Trail. Whether you’re training for an upcoming race, looking to connect with other runners/walkers, or just want to get to know the trail system better, this run series provides the perfect opportunity.

Trail runs/walks will be led by a Fairmount Park Conservancy staff person, in partnership with local run club leaders (see schedule below). Runners and walkers will start at the same spot and then take separate looped routes, finishing at the starting point at roughly the same time. At a few points along the route, we’ll stop and talk about the past and present of the Trolley Trail, which roughly follows the route of the old Fairmount Park Trolley that operated from 1896-1946.

Important run information: We will try to stay together as a group for each run. In order to allow us to finish before sunset, runners should be able to consistently run for 4.5 miles on trails. While this series is in partnership with local run clubs, you do not need to be part of the run club to attend.

Important walk information: We will try to stay together as a group for the two-mile walk, going at a moderate pace over a mixture of trails and sidewalks. The walk will NOT cover the whole Trolley Trail route. You do not need to be part of We Walk PHL to attend.