Lewiston Lake, the forebay of massive Trinity Lake, covers 610 acres, is about 6 miles long and has about 16 miles of scenic shoreline. It boasts a healthy population of rainbow, brown and brook trout, including some trophies.
Cold, constantly flowing water from Trinity provides an ideal, all season fishing environment. Its small size and protected valley setting makes it ideal for small skiffs, prams and float tubes.
This comprehensive guide will help you maximize your success at one of Northern California’s premier tailwater trout fisheries. Lewiston’s unique characteristics as a designated fishing lake make it a standout destination for serious trout anglers.
Lewiston Lake’s rainbow trout respond best to slow, deep presentations—try weighted soft plastics, egg imitations, or jerkbaits along the channel edges where colder currents concentrate baitfish, and drift live or cured salmon eggs near the dam for browns, while brookies turn up in the shallow, vegetated coves when you pitch small spinners or short-head streamers. Focus on the deep basin and undercut banks for brown trout after dark, and target brook trout when water clarity is highest by casting tight to shoreline brush with small woolly buggers or nymphs.
Lewiston is a designated fishing lake with a 10 mph boat speed limit. All types of angling are productive and fishing is good from both boat and shore.
This rich tailwater lake system has become extremely popular with fly anglers. Some work its clear waters in the winter when storms rile nearby salmon and steelhead streams.
To land trophy trout, concentrate on the steep drop-offs and structure just below the hydroelectric dam wall where large trout stage. Use oversized bait flanked with scent and fish it slow on a downrigger or with a vertical jigging spoon during morning thermoclines.
Keep presentations subtle, use fluorocarbon leaders, and time your retrievals with the afternoon flow shifts from water releases, as the biggest trout often eat when the current slackens. The dam area consistently produces the largest specimens in the lake.
Fly fishing Lewiston calls for skinny water, precise drifts of beadhead nymphs, and big attractor dries when midges cover the surface. Pair flashback pheasant tails, copper johns, and small rubber-legged streamers with a long, light leader to keep the fly moving naturally in the current.
For clear-water success, present the fly downstream with a reach cast, mend to control drag, and add short strips to encourage follows while covering deeper seams with weighted nymph rigs. The clarity of Lewiston’s water demands excellent presentation and leader management.
Spring opens with rising dam releases—focus on trout taking emerging midges and stripers along drop-offs—while summer’s clear, cold water pushes fish to deeper, cooler pockets where slow-trolled soft plastics or deep jigs work best. Fall sees aggressive browns feeding near structure and winter rewards anglers willing to fish tight to the dam with low-light tactics and egg patterns.
Match the hatch to local mayflies and midges throughout the year, keep lines tight during peak clarity, and fish the warmer shoulder seasons for the best balance of weather and trout activity. Each season offers unique opportunities and challenges.
When storms blow out the surrounding creeks, Lewiston Lake remains relatively calm because its flow is regulated by Trinity Dam releases, so trout stay put and feed aggressively below the dam. Anglers flock to the tailrace because the cold-water discharge creates a stable, oxygen-rich corridor that keeps trout active even as tributaries run muddy and high.
This consistent water quality during winter storms gives Lewiston a major advantage over nearby stream fisheries. The regulated flows create predictable fishing conditions year-round.
The 10 mph boat speed limit and calm surface make Lewiston ideal for small boats, float tubes, and prams, as low wakes preserve the clarity trout rely on and make it easy to quietly work the shoreline and deeper drop-offs. Because the lake is compact, you can land at multiple access points, launch from the ADA-friendly ramp, and reposition quickly without needing a large, high-powered craft.
The quiet, controlled environment enhances the fishing experience and allows for stealthy approaches to wary trout. This peaceful atmosphere is a major draw for many anglers.
Compared to Trinity Lake, Lewiston feels intimate, clear, and remarkably fishable for sight and finesse techniques, while Trinity’s vast size often requires longer runs and heavier tackle. Anglers choose Lewiston when they want a more concentrated experience with consistent trout structure, easier wading, and the ability to cover quality water without long boat rides.
The tailwater’s consistent temperature control keeps populations steady year-round, so Lewiston rivals Trinity for trout quality but wins for technical finesse and small-boat convenience. Each lake serves different angling preferences and styles.
For the reservoir, lean on 5- to 6-weight rods for streamers and weighted nymph rigs, paired with floating or intermediate lines to touch both shallower flats and deeper current seams. Keep a selection of beadhead nymphs, woolly buggers, and green/purple streamers handy for bright winter days.
Boat anglers should bring downriggers, 6- to 8-weight rods, and sinking tip lines for pulling articulated leeches along the current seams, plus trolling spoons and crankbaits around the inlet during midday. Proper equipment matching to conditions is essential for consistent success.
Shore anglers do best near the boat ramp access points where the flow concentrates and the rocky banks provide solid footing—work split-shot nymph rigs below the spillway and wade out to swing streamers along the edges. Boaters have the advantage of reaching the riffles just below the dam and deeper mid-lake ledges; run a drift over the submerged gravel for brown trout, then troll steep drop-offs near the marina for larger rainbows.
Both approaches can be highly productive when matched to conditions and target species. Shore anglers enjoy easier access while boaters gain mobility.
Facilities at Lewiston include 3 USFS campgrounds, two resorts, a marina, and two launch ramps. The Corps-maintained Lewiston Lake Campground offers 27 riverside sites with drinking water, vault toilets, picnic tables, and fire rings, while nearby Trinity Alps Resort provides cabin rentals, boat slips, and a store for art supplies and snacks; the resort’s marina services fuel, ice, and minor tackle so you can launch with minimal prep.
A concrete ramp at the campground plus paved ramps at the Lewiston Lake Resort (just downstream) keep seasonal boat traffic moving, while RVers can fill propane and dump tanks at the resort’s service area before staking a spot. The comprehensive facilities support both day trips and extended stays.
From Redding, head west on Hwy 299 for 35 miles to Junction City, then turn left on Forest Road 31 and follow it north 12 miles to the lake. Travelers from Eureka should take Hwy 299 east past Willow Creek before dropping south on Forest Road 31.
Highway 299 also brings you from Weaverville or Trinity Center—merge onto Forest Road 31 just before the highway makes the big sweep through Lewiston, and a well-marked county road leads down to both the campground and marina. The convenient access from multiple directions makes Lewiston easy to reach.
California fishing requires a current state license plus a Trout Stamp. Check the latest DFW bulletin for Lewiston Lake bag limits (typically 5 trout with only 2 over 16 inches, and no trout retention in the immediate tailwater).
Practice catch-and-release on browns when possible, pack out all trash, and avoid dragging boats through sensitive shorelines to keep sediment loads low, helping the tailwater stay clear for trout spawning and juvenile survival. Responsible angling ensures this fishery remains productive for future generations.
Information: Shasta Trinity National Forest, Weaverville, CA 96093, (916) 623-2121; Trinity County Chamber of Commerce, P.O. Box 517, Weaverville, CA 96093, (916) 623-6101
Planning a multi-lake trip or exploring more Northern California trout fishing? Check out these resources:
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