The Souhegan River is a great spot to fish in southern NH. Fish and Game stocks it heavily during the spring with all three species. There are supposedly also wild brookies present. Access isn’t a problem as much of the river flows through public land.
With around 30 miles of fish-able river, it can be tough to pick a spot and fish. With long stretches of pocket water, technical glides, and deep pools, there is plenty of water for everyone. This overview will help narrow it down.
With numerous bridges, hiking trails, and parks near the river, there are plenty of spots to fish on the Souhegan. However, much of this overview concerns the section above Milford, which is where I do most of my fishing.
North River Road Bridge (map coordinates)
This is a popular spot to access the river. Easy parking, easy access, and lots of fish. It can sometimes get crowded, although I’ve usually had the whole spot to myself. There is plenty of water above and below the bridge. Much of it is all fast moving pocket water, with a few big pools thrown in. The pool under the bridge is a good spot. You can nymph or throw streamers there. The bridge is pretty low and you can break a rod if you aren’t careful.
Monadnock Water (map coordinates)
You can park on the side of the road near Monadnock Water. There is a very large pool under the bridge that fishes well. Fish it with streamers or nymphs.The pool is deep and fast so caution is needed. Below the bridge, the water slows into a riffle, run, pool stretch that calls for a swung streamer or soft hackle. Above the bridge, there is ample pocket water. Fish are everywhere.
Route 31 (map coordinates)
The road parallels the river. There are many pull offs here. The best part about this section is the Delayed Harvest Area. It starts 300 feet below the Route 31 bridge and ends 300 feet above the Old Wilton Road Bridge. This section is full of fish-able pocket water, and it resembles a White Mountains stream. There are a few holdovers and wild fish in this section.
Since the Souhegan is mostly put-and-take, the fish aren’t overly picky. As far as flies, nymphs and streamers are the way to go. In my experience, there isn’t much dry fly action.
This river is chock full of caddis and flies such as hare’s ears, caddis pupa, pheasant tails, and soft hackles are effective flies. Attractor dries and streamers can draw vicious strikes from freshly-stocked fish. As with any river, be sure to match the hatch to find the best action. The holdover fish can be picky, as with any other river.