I keep getting hits about the schedule for the Monrovia Trolley even though I myself have never posted it. However, the city of Monrovia has failed to do so as well so as a service to those looking to find out here it is. I've also included approximate routes. I am in no way associated with Monrovia and in no way can I guarantee that the below hours of operation are correct or won't change.
Weekdays 11 a.m. to 2:30 p.m. * every 12 minutes (Goes form the Albertson Shopping center, down Huntington, to Myrtle and Foothill)
Fridays 4 p.m. to 12 a.m. * every 15 minutes (Goes from Fifth and Huntington, down Huntington, and up Myrtle. On Myrtle it turns left on Walnut, goes Up Primrose before heading back to Myrtle on Lemon)
Saturdays 4 p.m. to 12 a.m. * every 15 minutes. (Essentially same as above but without the turn on Walnut.)