From the south, take your favourite north-south road up to Eglinton Ave. and turn west (anywhere east of Black Creek or Keele this will be a left turn) onto Eglinton Ave. Proceed along Eglinton until you pass Keele. The park entrance will be on the left hand side shortly, just before you hit Black Creek Drive. From the north, take the 401 and exit onto Black Creek Drive. Proceed south on Black Creek Dr. until you hit Eglinton. Turn left (east) on Eglinton, and the park entrance will be right there on the right hand side.
Note that from the parking lot, you need to walk back up to Eglinton in order to cross the river and get to the field.
Take the University-Spadina line and get off at the Eglinton West Station. Board any 32 bus westbound EXCEPT 32C (take A, B, or D; 32C will veer off Eglinton before you get to the park). Get off the bus just before Black Creek Drive, and Keelesdale park will be ACROSS the street. Make sure you end up on the south side of Eglinton as the north side is a different park.
The field should be set up across the outfield of the baseball diamond located at the southeast corner of Eglinton and Black Creek Drive.