In Epping, New Hampshire where NH Route 87 crosses over the Lamprey River there is a small well-maintained parking area allowing access to the river and a trail head leading into the Lamprey River Wildlife Reserve, a portion of the Lamprey River Floodplain.
The parking area provides good access to launch a canoe and the trail head is to the right between the information sign and the river marked by two large rocks.
The trail follows the river with several side trails leading directly to it.
Be careful when approaching the river the bank is quite slippery, as Alex can attest in the video below.