What You'll Find at Columbia Slough

Columbia Slough is a 15-mile waterway that winds through northeast Portland and into the Columbia River floodplain. It holds warmwater species — largemouth bass, smallmouth bass, crappie, bluegill, and catfish — in a setting that feels removed from the city despite being surrounded by it. The slough moves slowly, with backwater channels, oxbow bends, and marshy edges that hold fish year-round.

The water is murky and shallow in most sections, ranging from 4 to 12 feet deep. Vegetation is thick along the banks — willows, cattails, and overhanging brush — which means the fishing is best in spring and fall when you can work the edges without getting completely snagged. Summer algae blooms can make the water difficult to fish, and winter flows can be high and cold.

This is not a destination fishery. It is a local resource for Portland-area anglers who want to catch fish without driving an hour. The slough is accessible, free to fish, and produces steady action if you know where to look and what season to target.

Key Takeaways

  • Columbia Slough holds largemouth bass, smallmouth bass, crappie, bluegill, and catfish in slow, shallow water surrounded by marsh and brush.
  • Spring and fall are the best seasons; summer algae blooms and winter high water make those months harder to fish.
  • Access points include Kelley Point Park, Whitaker Ponds, and several pullouts along Marine Drive, each with different parking and launch options.
  • Oregon requires a fishing license for anyone 18 and older, and the slough follows statewide warmwater regulations with no special restrictions.
  • Largemouth bass fishing is strongest in April through June and again in September and October when fish move into shallower water.

Access Points and How to Launch

Kelley Point Park is the main public access on the slough's lower end, where it meets the Columbia River. The park has a boat ramp, parking, and restrooms. You can launch kayaks, canoes, and small motorboats here. From Kelley Point, you can fish the slough itself or head into the Columbia River if you want deeper water and different species. The ramp is free and open year-round, though parking fills on weekends.

Whitaker Ponds, just east of Kelley Point, is a series of connected ponds that drain into the slough. Access is from a small parking area off North Lombard Street. There is no boat ramp, but you can carry a kayak or canoe to the water's edge. The ponds are shallower and more vegetated than the main slough, and they hold good populations of crappie and bluegill. This is a walk-in access point only.

Marine Drive pullouts run along the slough's south bank for several miles. These are informal parking areas with direct access to the water. You can fish from shore or launch a kayak. The pullouts are free and less crowded than Kelley Point, but there are no facilities. Look for the gravel areas where other anglers have parked.

The slough is also accessible from several neighborhood parks on the north side, including Bridgeton Park and Smith and Bybee Wetlands Refuge. These offer shore fishing and wildlife viewing but no boat launch.

Seasons and What to Expect

Spring (April to June) is the strongest season for largemouth bass. Water temperatures climb from the 50s into the 60s, and bass move from deeper channels into the shallows to feed and spawn. Throw topwater lures, soft plastics, and crankbaits along the vegetation. Crappie also bite well in spring, especially around submerged brush and fallen trees. Early morning and late evening produce the most consistent action.

Summer (July to August) is difficult. Algae blooms turn the water green and murky, and fish retreat to deeper channels and shade. If you fish summer, focus on early morning before the sun heats the water, and target catfish, which feed at night. The slough is still fishable, but you will work harder for fewer bites.

Fall (September to October) is nearly as good as spring. Bass move back into the shallows as water cools, and the algae clears. Crappie bite well again, and bluegill are active. By November, water temperatures drop into the 40s, and fishing slows. Winter (November to March) is slow overall, with high water and cold temperatures limiting access and fish activity.

Species and Techniques

Largemouth bass are the primary target. They live in the vegetation and along the deeper channels. Use 6- to 7-foot medium-power rods with 10- to 15-pound braid or monofilament. Soft plastics — 4-inch worms, crawfish, and shad patterns — work year-round. Topwater lures produce strikes in spring and fall, especially early and late in the day. Crankbaits that dive 3 to 6 feet work well in the deeper sections. Fish the edges of vegetation, fallen trees, and channel bends.

Smallmouth bass are present but less abundant than largemouths. They prefer harder bottom and deeper water. Use the same tackle and techniques, but focus on the main channel and rocky areas rather than the shallow vegetation.

Crappie (both black and white) school around submerged structure — brush piles, fallen trees, and pilings. Use light tackle (4- to 6-pound line) and small jigs (1/16 to 1/8 ounce) tipped with minnows or soft plastics. Spring and fall are best; summer and winter are slow.

Bluegill and other panfish are abundant and easy to catch. Use a simple rod and reel with 4- to 6-pound line, small hooks, and live bait (crickets, worms) or tiny jigs. They bite throughout the season, though spring and fall are most productive. Panfish are good targets for beginners and children.

Catfish are active year-round, especially at night. Use heavy tackle (20- to 30-pound line), large hooks (2/0 to 5/0), and stink baits or cut bait. Fish the deeper channels and let the bait sit. Catfish bite best from dusk through midnight.

Regulations and Licensing

Oregon requires a fishing license for anyone 18 and older. You can buy a one-day license, a three-day license, or an annual license through the Oregon Department of Fish and Wildlife website or at sporting goods retailers. Licenses are inexpensive and support habitat restoration on the slough and throughout the state.

Columbia Slough follows statewide warmwater regulations. There are no special closures or restrictions specific to the slough. Bass have a 12-inch minimum size limit and a daily bag limit of five fish. Crappie, bluegill, and catfish have no size limit and generous bag limits. Check the current Oregon Sport Fishing Regulations before you go, as rules can change.

The slough is open to public fishing, but some adjacent properties are private. Stay on the water and in public access areas. Do not trespass on private land or posted areas.

Gear and Boat Considerations

A kayak or canoe is ideal for Columbia Slough. The water is shallow and slow, and a small boat lets you reach the best fishing spots without disturbing the marsh. Kayaks are easy to launch from Kelley Point or carry to Whitaker Ponds. Canoes work well too and can carry more gear.

Small motorboats (under 25 horsepower) are allowed at Kelley Point, but the shallow water and vegetation make them less practical than paddled boats. If you use a motor, keep it slow and watch for submerged logs and debris.

Shore fishing is possible from Marine Drive pullouts and neighborhood parks, but you will cover less water and miss the best structure. A 6- to 7-foot medium-power rod is standard for bass and panfish. Bring polarized sunglasses to see fish in the murky water, a net for landing fish, and a headlamp if you fish early or late.

What Makes Columbia Slough Different

Columbia Slough is urban fishing. You are never far from the city, and you will see industrial areas, neighborhoods, and roads. That said, the slough itself is wild — it is a functioning floodplain with marsh, wildlife, and fish that behave like fish in remote places. Bald eagles, osprey, and herons are common. The slough is part of the Columbia River estuary system, and it supports salmon and steelhead runs in winter, though those species are not the primary target for most anglers.

The slough is also a restoration project. The city and state have been working to improve water quality and habitat for decades. That effort shows in the fish populations and the health of the marsh. If you fish here, you are fishing in a place that people care about and are actively trying to improve.

Frequently Asked Questions

Do I need a boat to fish Columbia Slough?

No. You can fish from shore at Marine Drive pullouts and neighborhood parks. A kayak or canoe gives you access to better fishing spots and more structure, but it is not required. Shore fishing for panfish and catfish is productive, especially at Whitaker Ponds and Bridgeton Park.

What is the best time of year to fish here?

Spring (April to June) and fall (September to October) are best. Water temperatures are ideal, algae is minimal, and fish are active in the shallows. Summer is difficult due to algae blooms; winter is slow and cold.

Are there any fish size or bag limits I need to know?

Bass have a 12-inch minimum and a five-fish daily limit. Crappie, bluegill, and catfish have no size limit and generous bag limits. Check the current Oregon Sport Fishing Regulations for exact numbers, as they can change year to year.

Can I fish at night?

Yes. Night fishing for catfish is productive. You can fish from Kelley Point or from shore at Marine Drive pullouts. Bring a headlamp and tell someone where you are going. The slough is safe, but it is dark and remote at night.

Is the water safe to fish in?

The slough is fishable and fish are safe to eat, but water quality varies. During algae blooms (usually summer), the water is murky and low in oxygen. Avoid swallowing water, and wash your hands after fishing. If you catch fish, clean them well before cooking.