A small almost inconsequential boulder on the east side, it has one problem with a variation.
Keep going on the east trail past Split Rocks, over a rise and continue to a fork in the trail, take the left one, and soon hit a small boulder on the right with the word "ACE" carved into it's left upper corner.
Browse More Classics in Ace Boulder
Mountain Project's determination of some of the classic, most popular, highest rated routes for Ace Boulder:
Ace's Traverse V-easy Boulder, 10 feet
Featured Route For Ace Boulder