 Community Transit was founded in 1976 as the public transit agency for Snohomish County, and introduced local service from Everett to Aurora Village via State Route 99 on route 750. Route 750 was later renumbered to route 610, which was later upgraded to 15-minute headways in the 1990s, and itself split into two routes, 100 and 101, in 2003. Community Transit route 100 ran during peak hours along the full length of the corridor from Aurora Village to Everett, while route 101 only ran the southern portion of the route to South Everett, with all-day service that required a transfer to Everett Transit to complete trips to downtown Everett.
