This is a nice, little area in Lawrence (I thought it was in Andover) with short routes of low end difficulty. The park is 80 acres and belongs to the city. The rock is fairly rough with buckets galore. Consider long slings and a sturdy rope for climbing here. Anchors require pro. Some will just boulder here. There is supposedly rock to 100 ft here.
The crags from N to South are First Impressions, Desperado, Inner Walls, Building Blocks, Petroleum Based Buttress, FK Face, City Dump, City Park, Remnants. Above City Park is a small boulder.
Apparently, below The Buidling Blocks area is a new bouldering area.
Getting There
To get there from Boston, go N on I-93, go E on I-495 to exit 42A. Go S on Hwy 114 for 0.4 mi. Paaark on the W side. Go S away from the North Andover shopping mall. Take a left (E) and follow a dirt road. The first crag you will reach is First Impressions.
Don't climb at Denrock much, but when I went last I saw nothing even close to 100ft. Highball bouldering or short short top-rope. Many TR anchors are being bolted. Kinda dirty (in a ghetto way) and super contrived much like Lincoln Woods though the rock is different. Maybe enough for a weekend if you climb hard (past V8 or so) but if your like me you'll find some projects, especially with variants. Not destination worthy but if your in the area or passing through on the way to P-tuck or Lincoln worth checking out.
New to mtn prjct, maybe next time I'm down that way I'll take some photos
No face at Den Rock exceeds 30 feet, Desperado being the highest. Most of the crags are around 20-25. The rock is pegmatite, a sharp granite with lots of crystals. In 2007 a large number of anchors were installed, protecting the tops of the first six crags from the parking lot. This makes TRing much easier, as previously very long slings had to be used. The bouldering referred to in the description is sparse and somewhat vague. Below the Building Blocks face are two boulders, each with 2-3 problems V 1-4. The Remnants and City Dump areas are short enough (12-15 and 15-20 feet respectively) to be bouldered. Above the City Park section is an 8-10 foot slabby boulder with short problems V 0-2.