The trail is paralleled by a wide dirt area on the North side (often used by equestrians, joggers and dog walkers) suitable for mountain bikes.
However, with the widespread adoption of cars, trucks, and buses in subsequent decades, revenue from passenger traffic, mail delivery, and cargo crashed and the public showed little appetite for investing in rail transit.
After a big resurgence during World War II, with rationing and a need for efficiency, ridership crashed again and the Monrovia-Glendora line closed in 1951.
Royal Oaks Drive and Encanto Pkwy are posted with class 3 bike trail signage, the roads are fairly wide and traffic is light.
From the Encanto Parkway bridge it is possible to go North on the San Gabriel River bicycle path a few miles to the entrance of Azusa Canyon or South to Santa Fe Dam and beyond to the Pacific Ocean.