What You'll Find in the Eel River

The Eel River in Plymouth is a tidal estuary that holds eels, catfish, and seasonal runs of herring and shad — not a destination for largemouth bass or trout, but a working tidal system where you can catch real fish on light tackle year-round. The river runs roughly three miles from its mouth at Plymouth Harbor inland to the Jenney Grist Mill, and the lower two miles are where most anglers fish. Water here is brackish to fresh depending on tide and season, and the bottom is soft mud and sand with scattered rocks near the old mill.

Eels dominate the catch from late spring through fall. American eels move upriver on the incoming tide, especially at night, and you can take them on small live shiners, bloodworms, or cut mackerel fished on the bottom. Catfish — both channel and flatheads — show up in summer and early fall, particularly around dusk and after dark. Herring and shad run through in spring (April and May), and if you're there on the right tide you can sight-cast to them with small spoons or shad flies. The river also holds white perch year-round, though they're smaller than what you'll find in nearby ponds.

Key Takeaways

  • The Eel River is a tidal estuary where eels and catfish are the primary catch, with seasonal herring and shad runs in spring.
  • Fish the lower two miles from the mouth near Plymouth Harbor up to the Jenney Grist Mill, where parking and access are most reliable.
  • Incoming tides and night fishing produce the best results for eels and catfish; spring tides (new and full moon) concentrate fish in the narrows.
  • No special permit is required to fish the Eel River, but check Massachusetts fishing regulations for season dates and size limits before you go.

Access Points and Parking

The most practical access is at the Jenney Grist Mill parking area on Spring Lane in Plymouth, which sits at the head of tide. From here you can walk down to the mill pond and fish the upper estuary, or walk the banks downstream toward the harbor. Parking is free and the lot holds about a dozen cars, though it fills on weekends. The walk to water is short — less than a quarter mile — and the banks are open enough to move along without bushwhacking.

For lower-river access closer to the harbor mouth, use the public boat ramp at Town Wharf on Water Street in downtown Plymouth. You can launch a kayak or small skiff here, or park and fish from the seawall nearby. This spot gives you access to the saltier lower reaches where herring and shad concentrate during their runs. The ramp is maintained by the town and the parking lot is metered, so bring quarters or use the pay station.

A third option is informal access along the banks near the old railroad bridge, but parking is limited and the area can be muddy. Stick with the Jenney Mill or Town Wharf unless you know the ground.

Seasonal Patterns and What to Fish

Spring (April through May) brings herring and shad into the river on their spawning runs. These fish move upriver on incoming tides, especially in the hour or two after the tide turns. Fish small spoons (1/4 to 1/2 ounce) in silver or gold, or tie a small shad fly (2 to 3 inches) on a light spinning rod. The narrows near the mill are where they stack up, and you can sight-cast to them in clear water. The run is short — usually three to four weeks — so timing matters.

Summer (June through August) is eel season. Eels feed heavily at night and on the incoming tide, and they'll take bloodworms, small shiners, or cut mackerel fished on the bottom with a simple sinker rig. Fish the deeper holes and channels, particularly where the current slows. Catfish also move in during summer, especially in July and August. They prefer live bait or fresh cut fish, and they feed after dark. Fish the same bottom rigs you'd use for eels, but use larger baits and fish the deeper pools.

Fall (September through October) is a transition. Eels are still active and the water is cooler, which can improve fishing. Catfish linger into early fall. By late October the activity drops as water temperature falls. Winter fishing is slow; the river doesn't freeze solid, but fish are lethargic and scattered.

Tackle and Bait

For eels and catfish, keep it simple: a medium-light spinning rod (6 to 7 feet), 10- to 15-pound monofilament, and a basic bottom rig with a small sinker and a single hook (size 2 to 1/0 for eels, 1/0 to 3/0 for catfish). Bloodworms are the gold standard for eels and will cost you $8 to $12 per dozen at any tackle shop in Plymouth. Live shiners (2 to 3 inches) work well and are cheaper. For catfish, use larger shiners or cut mackerel.

For herring and shad, switch to a light spinning setup with 8-pound test and small spoons or shad flies. A 6-foot rod is plenty. You don't need anything fancy — the fish are aggressive during the run and will hit basic lures.

Bring a headlamp if you plan to fish at night for eels or catfish. The banks are dark and you'll need to see your rig and any fish you land. A small net makes handling eels easier; they're slippery and a net saves you from dropping them back in the mud.

Tides and Timing

The Eel River is tidal, and tide makes a real difference. Incoming tides concentrate fish and push them upriver; outgoing tides scatter them. For eels and catfish, fish the last two hours of the incoming tide and the first hour after high tide turns — that's when they're most active. For herring and shad, the same window applies, but you can also catch them on the outgoing tide if the water is clear and you can see them.

Spring tides (the new moon and full moon) create the strongest current and concentrate fish in the narrows and deeper holes. Neap tides (quarter moons) are weaker and fishing is slower. Check a tide table for Plymouth Harbor — the Eel River follows the same schedule — and plan your trip around the incoming tide if you can.

Night fishing for eels and catfish is often more productive than daytime, especially in summer. The water is cooler, the fish are more active, and there's less boat traffic. If you're new to the river, fish during the day first to learn the layout, then try night fishing once you know where the holes are.

Regulations and What to Know Before You Go

Massachusetts requires a fishing license for anyone 16 and older. You can buy a one-day license for about $10 or a seven-day license for around $25 at any tackle shop or online through the Massachusetts Division of Fisheries and Wildlife website. No special permit is needed for the Eel River itself.

Check the current size and possession limits for eels, catfish, herring, and shad before you fish. These change year to year and are posted on the Division of Fisheries and Wildlife website. Eels have no minimum size in Massachusetts, but there may be a daily possession limit. Catfish have no size limit. Herring and shad have seasonal closures and size minimums that vary.

The river can be crowded on weekends, especially during the spring herring run. Weekday mornings are quieter. The banks can be muddy after rain, so wear boots. Bring bug spray in summer — the salt marsh breeds mosquitoes.

Nearby Water and Alternatives

If the Eel River isn't producing, you're close to several other options. Manomet Pond, just south of Plymouth, holds largemouth bass and white perch and is easier to fish than the tidal estuary. The Herring Run in Weymouth (about 20 minutes north) has a similar spring herring run and is worth a trip if you want to sight-cast to shad and herring. The Taunton River, about 30 minutes south, is larger and holds catfish, eels, and stripers, though access is more scattered.

If you want to stay in Plymouth and fish salt water, the harbor itself holds stripers and bluefish in summer and fall. The breakwater near the lighthouse is a popular spot, though it can be crowded.

Frequently Asked Questions

Do I need a boat to fish the Eel River?

No. The banks are accessible from the Jenney Mill and Town Wharf, and you can catch eels and catfish from shore. A kayak or small skiff is useful if you want to reach the lower river near the harbor mouth, but it's not necessary for the upper estuary where most fish are caught.

What's the best time of year to fish the Eel River?

Spring (April and May) for herring and shad if you want to sight-cast to larger fish. Summer and early fall (June through September) for eels and catfish, which are more reliable and available all season. Winter is slow and not worth the trip unless you're desperate for something to do.

Can I catch stripers in the Eel River?

Occasionally, especially in spring and fall when they move through Plymouth Harbor. The Eel River is too small and shallow to hold stripers year-round, but they do pass through on their migrations. Fish the lower river near the harbor mouth for the best chance.

Is the Eel River safe to wade?

The bottom is soft mud and can be slippery. Wear wading boots with good grip. The water is brackish and can be murky, so watch your footing. Wading is possible but not necessary — most fish can be caught from the banks or from a boat.

Where can I buy bait for the Eel River?

Any tackle shop in Plymouth carries bloodworms, shiners, and mackerel. The closest shops are on Water Street downtown, within a few minutes of the river. Call ahead if you're going early — some shops don't open until 7 or 8 a.m., and bloodworms can sell out on weekends.