Though it's home to a small collection of nice routes, newcomers to the Upper Passes may find getting oriented harder than the climbing itself. Suck Creek Canyon's approaches aren't well-worn trails with nice switchbacks like you'll find at T-Wall, and this is expecially true for the Upper Passes. According to locals, the landslide that has always served as a good landmark has become somewhat vague, and deadfall on parts of the cliff "trail" makes things more confusing. In the words of Suck Creek regular Tyler Stracker: if you hit the cliff at the right place the first time, go buy a lottery ticket, 'cause it's your lucky day.
After crossing the bridge over Suck Creek, continue about a half-mile up the canyon to a pullout on the right. Make your way down a steep hillside to the creek; cross it, then follow a huge landslide up to the base of the cliff. Main Wall routes are located to the left of this landslide, while the Auschwitz Buttress is to the right.
Sacramento
As for the "trail," I don't know that it exists in 2023. Locate the rock visually from the parking and the river, then try to hike straight up to through whatever looks easiest. It's a bushwhack, but it ain't that bad -- 30-40 minutes at a casual pace Nov 4, 2023