by google transit . start e.g. 5th & d streets eureka ca end e.g. 1 harpst street arcata ca depart at or arrive by schedules weekdays red and gold routes saturday orange route service updates there are no current service updates . news & announcements there is no current news . about arcata & mad river transit system a & mrts is the public bus system that serves arcata california offering several routes that run monday friday and limited saturday service . subscribe to receive updates for news & service announcements email more about this email group contact feedback link to arcatatransit.org site credits amrts non discrimination policy & complaint procedure title vi program