We started on the Signal Ridge Trail off Sawyer River Road . At the junction with Carrigain Notch Trail we took it. There was no official path to Vose Spur, but there was a pretty good herd path to the summit from Carrigain Notch Trail. Soon after passing Bushwhack Boulder we took the herd path on the left, stepping over a large birch log, and followed it to the summit. We then continued our bushwhack down the western side to the talus strewn col between Vose Spur and East Carrigain. The bushwhack continued up East Carrigain and then followed the ridge to the fire tower atop Mount Carrigain. We looped back to our car by taking Signal Ridge Trail back to the trailhead.
The hike was about 10 miles with 3600′ elevation gain and took us under eight hours to complete.