Signs bordering this whole area read "Centennial Watershed State Forest, Public Water Supply, Public Access by Permit Only"
From some research I've done it seems that this land is managed by the Redding Land Trust. Here is their website - http://www.reddingctlandtrust.org , and email: info@reddingctlandtrust.org
BETA PHOTO: Looking at the Great Ledge from the climbers right...
Description
The cliff is in a gorge that is shady a fair amount of the day (as far as I know). There is a fair amount of tree cover and a drainage at the bottom of the gorge area. The rock is grainy but solid feeling - gneiss? metamorphosed granite? I'm not a geologist but it's good from what I can tell. Clearly people boulder here and some people may do a few trad climbs but due to a bit of a hike to get to the face, the area is not crowded.
Getting There
From Route 15/Merritt Parkway take the Westport/Weston exit and get on Weston Road going North towards the Weston Town Center. Continue North on Weston Road which becomes Newtown Turnpike. As you continue on Newtown Turnpike there will eventually be a reservoir on your right (East) - continue on this pleasant wooded road for a couple miles and look for Tudor Road on your Left. Take Tudor Road. Turn left onto Dayton Road.
Keep your eyes open for a parking area on the right side of the road with a sign that reads "The Nature Conservancy, Devil's Den Preserve, Redding Land Trust". Park here, cross the street and head back down the road to a driveway on your right. Look for white blazes on the left side of this driveway - this is the trail that leads to the Great Ledge.
This trail goes uphill for a little more then a mile (maybe further) to a junction with a sign that says "Great Ledge". Follow the sign for another 1/2 mile to the top of the ledge.
There is a vague climbers trail near a stone wall just before you get to the actual top of the ledge. Take this downhill looking to your right for the cliff.
Alternatively you can access the great ledge via Devil's Den. This route will be a longer approach. I have uploaded a copy of the Devil's Den trail map with the Great Ledge loop highlighted.
I have not personally GPSed the location of this crag - I just found the general area on the map so please don't use a GPS and rely on these coordinates to bring you to the crag!
The Classics
Mountain Project's determination of some of the classic, most popular, highest rated routes for The Great Ledge: