[Hide Comment] Did this 10/19 and going up the scree field off the Mammoth Rock trail is super dangerous- lots of loose rocks and loose dirt that can dislodge big rocks. Once you make it to the base, traversing south to the chimney is even worse for potential rock slide, although the wall does have good hand holds. We were careful and slow and still sent rocks down. Don't go this way. Instead park at the trailhead and walk up the paved road to an old 4x4 road, about a quarter mile on the right. Then go up the road to the old mine camp (will smell like sulfer) (can also drive a 4x4 up here and park). At the end of the clearing there is a thin, steep trail- take this through the woods, through scrub, to the saddle on the north-ish side (maybe 10 minutes) . From the saddle, head right/south and up a much better but still loose trail to the base of the chimney/class 3. You should be able to see the chimney when you are headed up the scramble the last 100-150 meters. It'll end right at the chimney. Have fun! Oct 23, 2019