Trip Report - Nov 1, 1991 - Jack Parsell
ACCESS ROUTE: The easiest route to this tri-point is via the Mount Riga Road from Salisbury CT. From Salisbury go NW on Washinee Street for 07 mile, then L on Mount Riga Road for 2.9 miles to its junction with Mount Washington Road, near the SE end of South Pond. Turn R and proceed on Mount Washington Road 2.2 miles to a small clearing on the left, with a metal gate across a jeep road which starts at this point. Park in the clearing and hike NW 1.2 miles on the jeep road to a trail off to the R marked by a small stone cairn. This point is just before the second stream crossing on the jeep road.
From the cairn, go N 0.3 mile to the tri-state marker stone. On this trail, you will pass a NY - CT line marker shortly after leaving the jeep road. There are inscriptions on both NY and MA sides of the tri-point marker, but no identification on the CT side. From the tri-point, it is only 0.3 mile E to a point on the shoulder of Mt. Frisselll that is the highest point in CT. The true summit of Mt. Frissell is only a short distance N in MA.
Trip Report - ??? - Brian J Butler
You can view the trip report at The Corner Corner.
Update - July, 2003 - Jack Parsell
Another route is from the Mt. Washington Road near the MA - CT line. The trail to Round Mtn starts there. Continue over the top of Round Mtn to a left branch in the left just before the top of Mt. Frissel. Continue down past the high point of CT to the tri-point.
Trip Report - Aug 4, 2012 - Steve @ CTMQ
You can view the detailed trip report and learn about the associated border dispute at CTMQ.
Update - Sept, 2015 - Frank Sutman
[new directions] ACCESS ROUTE: The most straightforward access is to climb Mt. Frissell (CT highpoint) and then descend the SW shoulder of the mountain. The hike to the tri-point is only about 4 miles RT from the road. Most should allow 3-4 hours for this trek due to a lot of steep but relatively short up and down.
From the north: From South Egremont, Massachusetts, follow SR 23 to the west until SR 41 junctions to the left (south). In less than mile, Mount Washington Road turns to the right off of SR 41. Follow Mt. Washington Road past Bash Bish Falls State Park. Eventually, Mount Washington Road becomes a gravel/dirt road. Continue onward until you pass a Massachusetts/Connecticut state line marker. Immediately after this is a small parking lot on the left with an "AMC" sign. Park here.
From the south: In Salisbury, Connecticut, go west on US 44 and then turn right on to Factory St. Shortly thereafter, you should bear to the right onto Mt. Riga Road. Mt. Riga road eventually turns into a gravel/dirt road and continues a couple of miles to Mt. Washington Road. Turn right onto Mt. Washington Road, and go 3.3 miles to the AMC parking lot on the right.
From the AMC parking lot, walk north along the road past the state line marker and turn left onto an old gravel and stone road. In a very short distance, you will see a trail that turns left from this old road. The trail is well-marked with frequent red blazes the whole way. The trail ascends steeply up Round Mountain where there are views to be had in every direction. From here you can see Mt. Frissell, which is a bit taller. You descend slightly to a col and then climb steeply up Mt. Frissell. At the top, the trail divides with the right spur going a hundred feet to the true summit of Mt. Frissell with a register canister on a tree. The left spur goes to the southwest descending a bit and then leveling out. Keep your eyes open for the cairn with a State Line marker. This is the highest point in Connecticut.
After the high point at the CT border, the trail descends W roughly along the CT-MA border another 0.3 miles to reach the tri-point marker. There are inscriptions on both the NY and MA sides of the tri-point marker, but no identification the CT side.