Carlson Dog Park at the foot of Mt. Rubidoux, alongside the Santa Ana River and the paved trail up Mt. Rubidoux is a short way from Carlson Dog Park and offers more of a challenge for you and your dog. On a clear day, it’s definitely worth the hike, with a 360 degree view of the Riverside area. Mission Inn St. and go west through downtown Riverside past Market St. The park is on the south side just after you cross a large bridge but before you get to the riverbed.