To reach the Cambridge trailhead by subway, take the MBTA Red Line to the Alewife Station. Bicycles are allowed on weekends and during off-peak hours on weekdays; see mbta.com for details. A Blue Bikes bike-share station is located at the Alewife Station (bluebikes.com). Pick up the trail on the north side of the terminal.
To reach the Cambridge trailhead by car from I-95, take Exit 29A to MA 2 toward Boston. Go 5.9 miles and take the Alewife Station exit. The Alewife Station Access Road becomes Steel Place. Go 0.4 mile and turn left into the parking garage (fee charged). The trail starts on the north side of the building.