I brought my 2m rig (Radio Shack HTX-252) to the parking lot near the summit of Whiteface Mountain, not far from Lake Placid, NY. Because the parking spot isn't directly at the summit, it's only a clear path towards the north side (south blocked by solid rock). Montreal is clear line-of-sight.
My location was: 44° 22' 01" N, 73° 54' 19" W
The height at that location is about 4600-feet.
On 146.52 MHz FM simplex (direct), I made contact with three amateurs in and around Montreal. The longest path was roughly 200 km.
VA2GIZ, Alain
VE2FET, Sylvain
VE2JM, Jean