The LA County San Dimas Sheriff Station said their deputies responded to a call of a lion seen roaming along Foothill Avenue between San Dimas Avenue and San Dimas Canyon Road on Friday morning. 5 A mountain lion is seen roaming in a residential area of northern San Dimas along Foothill Avenue. 5 The California Department of Fish and Wildlife confirmed it responded to the scene after getting a call about an injured mountain lion. “We can confirm the mountain lion is female. San Dimas Sheriff's Station's5 Authorities respond to a mountain lion found in a residential area of San Dimas, California.