Once you get to the car park (see directions below), it's a 4-mile round trip hike with modest uphill climbing and a fair bit of exposure to the sun on the climb. The official trail takes you to the top of the falls with limited partial views of that waterfall along the way. However, a steep scramble (reasonably doable, but not for everyone) down a gully with a guardrail fronting it takes you to the base of the waterfall, where there is a pleasant little cove and the views are infinitely better.

Now, you're on the mountain road, which you follow nearly 3.5 miles to a signposted turnoff for "Trail Canyon" to your left. You're now entering the Angeles National Forest (so pay and display Forest or Adventure Passes are required for parked vehicles). This turnoff is a dirt road, where it can be scary in parts as it has deep ruts, but I think most passenger cars should have no problem if you take it slow (at least that was the case back in 2001 or 2002 when I last did this). Keep bearing right at the junctions until you reach the car park at the end of the 1/4-mile road.