Fall River Fly Fishing Report - May 5/10/2026
FALL RIVER (CALIFORNIA) FLY FISHING REPORT
Prime Time is Here — PMDs Firing, Wild Rainbows on the Rise
Current River Conditions
Real-time gauge data unavailable. Historically, Fall River runs at stable spring-creek flows year-round, unaffected by snowmelt runoff. Current reports confirm water is clear and at normal levels — expect gin-clear visibility throughout the productive float-tube sections.
Real-time gauge data unavailable. As a spring-fed creek, Fall River maintains consistent temperatures typically in the low-to-mid 50s°F year-round, ideal for active trout feeding and safe catch-and-release.
Weather data unavailable for this report period. Dress in layers for cool spring mornings on the water; afternoon warming typically triggers the best PMD hatches. Check NOAA forecast for McArthur, CA before heading out.
Open year-round. Wild trout water — catch & release only. Artificial lures/flies only. Single barbless hook only. No motors permitted. Float tube or non-motorized watercraft required for most productive sections. No dropper or tandem rigs.
Hatch Chart
| Insect | Size | Activity | Prime Time |
|---|---|---|---|
| Pale Morning Dun (PMD) | #16–18 | 🔴 Peak | Mid-morning to early afternoon (10am–2pm) |
| PMD Spinner Fall | #16–18 | 🔴 Peak | Late morning, spent spinners drifting midday |
| Blue Wing Olive (BWO) | #18–20 | 🟠 Active | Morning & overcast afternoon windows |
| Caddis (Olive/Tan) | #14–16 | 🟡 Building | Late afternoon into evening |
| Midge | #20–24 | 🟠 Active | Early morning, all day in slower flats |
| Green Drake | #10–12 | 🟡 Possible | Midday — watch for first reports; not confirmed yet |
Recommended Flies
- Tungsten Split Case Nymph - PMD #20 — Dead-ringer PMD emerger; fish it just below the film during morning hatch windows near weed bed edges.
- Stealth Link Mercer - PMD #20 — Articulated PMD nymph that mimics a swimming emerger perfectly in Fall River's slow, clear currents.
- Split Case - PMD #14 — Slightly larger profile for the early-season PMD nymphs; excellent in the feeding lanes along weed beds.
- Parachute - Blue Wing Olive #22 — Essential for the morning BWO hatch; the parachute post aids visibility on Fall River's glassy surface.
- Barr's Flashback Emerger - BWO #22 — Fished in the film during BWO windows; the flashback triggers selective risers that ignore standard duns.
- Egan's CDC Rainbow Warrior #22 — Versatile midge/BWO emerger; exceptional on Fall River's flat, slow sections where fish inspect every fly.
- Corn-fed Caddis (CDC) Olive #20 — Matches the olive caddis building on the river; CDC wing sits flush in the film for a natural presentation.
- Corn-fed Caddis (CDC) Tan #20 — Tan variant for the afternoon/evening caddis activity; low-riding profile fools wary spring-creek fish.
- Roza's World Spain Perdigon Barbless #18–32 — Fast-sinking perdigon cuts through the water column quickly; deadly when nymphing the deeper ledges and channels.
- Egan's Thread Frenchie Jig - Olive #12 — Slim, UV-active jig nymph; excellent for sight-nymphing to individual fish holding along weed edges.
- Olsen's Hare's Ear Blowtorch Barbless #20–28 — Barbless hare's ear that covers BWO and midge nymph stages simultaneously; a confidence fly for Fall River's selective trout.
- Tungsten Jig Bugger - Olive - Barbless #14 — When dry fly action is slow, swing or strip this streamer along undercut banks and log structures for aggressive takes from big rainbows.
Tactics & Tips
Regulations First: Fall River is artificial flies only, single barbless hook, catch-and-release, with no motors permitted. No tandem or dropper rigs — fish one fly at a time. This is wild trout water; handle fish with wet hands, minimize air time, and use a rubber-mesh net. Revive every fish fully before release in the slow current.
Float Tube Access: A float tube or non-motorized pontoon is essential for reaching the most productive stretches. Launch early to position yourself before the PMD hatch fires mid-morning. The section from the headwaters upstream of Island Road Bridge is the epicenter of the PMD spinner fall — be there by 9:30am.
PMD Strategy: The PMD hatch is the main event right now. Start with a Tungsten Split Case PMD or Stealth Link Mercer fished on a long, fine leader (12–14 ft, 5X–6X tippet) to nymphing fish. As the hatch progresses and fish begin rising, switch to a Parachute or CDC dry. Watch for the midday spinner fall — spent PMDs drifting in the film can trigger the most selective, sustained rises of the day. Approach rising fish from downstream, make your cast count, and let the fly drift drag-free for as long as possible.
BWO Windows: On overcast mornings or when cloud cover rolls in, BWOs can spark excellent dry fly action. The Barr's Flashback Emerger fished just subsurface or the Parachute BWO on top are your go-to choices. Fish the film with a cripple or emerger pattern when you see fish sipping rather than splashing — they're eating stuck-in-the-shuck insects.
Nymphing the Ledges: When no hatch is visible, sight-nymph to individual fish holding along weed beds and ledge drop-offs. The Roza's Perdigon and Egan's Thread Frenchie Jig in olive are excellent choices. Use a long, light leader and watch the fish's mouth or a subtle indicator for the take. Presentations must be precise — Fall River's crystal-clear water gives every trout a front-row view of your fly and tippet.
Streamer Option: Don't overlook the Tungsten Jig Bugger in olive stripped along undercut banks, log structures ("log cabins"), and deeper pools. This can produce some of the largest fish of the day, especially early morning before hatches begin. Keep it subtle — slow strips and pauses work better than aggressive retrieves in this clear water.
Green Drake Watch: Keep an eye out for the first Green Drakes of the season — they haven't been confirmed yet but could appear any day now. If you see large mayflies (#10–12) fluttering clumsily off the surface, the fish will know about it before you do.
