Hi, if you are coming from Lincoln Woods, just go straight to Franconia Falls via the Wilderness Trail, or I think that's what it's called, or used to be called. Right after you go by Franconia Falls, you will see a sign that says 'End of Trail", but it's only the end of the official trail. There is a somewhat popular bushwack that pretty much follows the Lincoln Brook until it meets up with the Lincoln Brook Trail. It seems to follow one or more herd paths. I have only done the bushwack from the Lincoln Brook trail to Franconia Falls, not the other way around, but it was not hard, and long as you follow the river, you should be alright.