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All routes are drawn approximately as described in Boston Rocks by Doucette and Ruff. M Crack is in red. It has a harder variation (dashed lines) to the left. I'm not completely sure where it tops out. I don't know if you are supposed to go over the small roof at the top or around it.
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dragons
Sep 12, 2011
All routes are drawn approximately as described in Boston Rocks by Doucette and Ruff. M Crack is in red. It has a harder variation (dashed lines) to the left. I'm not completely sure where it tops out. I don't know if you are supposed to go over the small roof at the top or around it.  
Simon Kwok
Boston, MA
Simon Kwok   Boston, MA
You definitely go to the left of the roof. There's really nothing but smooth slab above that roof. Jul 14, 2018

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All routes are drawn approximately as described in Boston Rocks by Doucette and Ruff. M Crack is in red. It has a harder variation (dashed lines) to the left. I'm not completely sure where it tops out. I don't know if you are supposed to go over the small roof at the top or around it.