Bouldering on the O Wall.
The alcove at the right end of M Wall has some nice bouldering, but it often tends to be wet. Access to the top can be gained from the right end.
L to R:
1. Easy Arete, 5.3-4.
2. Broken Slab, 5.3.
3. Dyno, V0-V2.
4. Sweet N Low, unrated (bouldering).
5. Sweet N High, unrated (bouldering).
To the right of the gap in the cliff with a view of the Boston Skyline, O Wall rises out of the ground, culminating in a 15 foot arete with good holds. To the right of the O Wall, the cliff shortens abruptly to a few feet and forms the boundary between Granite Railroad Quarry and Swingle's Quarry.
1. O My, 5.6.
The approach is the same as M Wall in the Granite Rail Road Quarry,.