We're revisiting this one, since it got such good reviews! The trail we walked previously was 3+ miles out to the waterfall and back, so we only did about halfway there (3 miles total). This is a very pretty, easy trail so if walkers want to go farther, they certainly can! Good for all activity levels. Since parking is free at the Canyonside Park lot, albeit a bit busy, we'll aim for parking there. I recommend arriving a bit early so you can snag a spot.
From Interstate 15, exit Mercy Road and travel west. Turn right on Black Mountain Road. Turn left at the first light, Canyonside Park Road. Drive all the way to the end of the parking lot (ball fields will be on your right hand side) to park by the trail head.