It's unclear if you have to go through customs to hike this last portion of the trail; having a passport is recommended, though.
This section, of the Cohos Trail, starts from the parking area at the bottom of the Second Connecticut Lake and follows Idlewilde Spur
. The trail turns left onto Idlewilde Road, then right onto R & J Chaput Trail
. It passes by a large balancing rock, called Lainie's Lair.
It turns right onto Route 3 (for a short distance), then turns left onto the Lower Black Cat Trail
. After crossing over a dirt road, the trail follows Middle Black Cat Trail
. Along this stretch, you'll pass by Johnson Spring Spur
, a decent place to tank up on some water.
After crossing another dirt road, the trail follows Upper Black Cat Trail
. The Upper Black Cat Trail
ends at the Lynx Trail/ NH Primary 144. Follow the snowmobile trail left until you come out to Sophie's Lane (ATV Route)
. The Cohos Trail follows Sophie's Lane all the way up to "No-man's Land", in-between the two countries.
Along this stretch, is the last place to camp, before reaching the Canadian border. At "No-man's Land", take an immediate left onto the Fourth Connecticut Lake Trail
. Here, the trail weaves it's way back and forth over the two countries. The Cohos Trail ends by looping around the headwater tarn of the Connecticut River.