The western highlands are served by Citylink buses .Between Crianlarich and Glen Coe there are no other services
Citylink buses will stop anywhere it is safe to do so once they are out of the towns so one can request a stop that is convenient for Glen Etive, or Beinn Mhanach for example .
Afterwards , just make sure you are hailing the bus where it is safe to stop and you will be able to get on.
At busy times it is better to have booked in advance
Glen Etive is a particularly easy road for hitchhiking to access the Munros and Corbetts in the Glen .