The Upper Sacramento River in Shasta County offers multiple accessible fishing and paddling access points along Interstate 5, with over 15 freeway exits providing roadside access to the river.

Key access areas include Sims Flat campground (USFS site with $12-15 nightly fee), Castle Crags State Park ($6 day use, $15 camping), and Pollard Flat (day use picnic area with parking for seven vehicles).

The river features continuous Class II-III rapids for paddlers and excellent freestone fishing with riffles, runs, and pocket water accessible via short hikes from parking areas.