Fishbrook Pond and Erebus Trail Junction
At the south end of the lake you should have passed by a lean-to. You also probably had a view of the north lean-to across the pond as well. At the trail junction at the north end of the pond you'll see the red Fishbrook Pond Trail from the lake shore coming in on the left. You will want to continue ahead onto the Lapland Pond Trail following yellow markers on the trees now.
Tip: You need to make a decision here.
1. You can take the red Fishbrook Pond trail for an epic descent over difficult terrain to the shore of the lake for a shorter loop of about 16 miles or 2. continue on towards Lapland Pond for the truly epic loop of this guide. If you decided to head towards the lake from here you will pass a trail heading off to your left about a half mile down the hill Fishbrook Pond. That heads to the top of Erebus. Ignore that trail and keep heading for the downhill for the lake. A 3rd option would be to simply turn around and head back the way you came for a ride of 10 miles.
If you have the energy keep going towards Lapland Pond. The trail first climbs past marshy Millman Pond then descends towards Lapland Pond through another semi-wet area.