Stillwater River Fly Fishing Report - April 4/5/2026
STILLWATER RIVER FLY FISHING REPORT
Cold-water focus: nymphs, midges, BWOs & slow streamers
Current River Conditions
Flow: Regulated/reservoir-influenced — low to moderate spring releases
Water Clarity: Mostly clear to slightly stained in runs; visibility variable near banks
Current: ~40–44°F (4–7°C)
Daily Range: 38–47°F
Trend: Slowly warming through April — fish remain in cooler, deeper lies
Forecast: Cool mornings, mild afternoons; light wind most days
Angling windows: Best subsurface action morning through midday; streamer opportunities any time in low light
Access: Most public access points open; expect muddy/soft banks in some sections
Safety: Cold-water shock risk—wear an insulated wading layer and always carry a wader belt and PFD on the boat
Hatch Chart & Insect Activity (early April)
| Insect | Size | Activity Level | Prime Time |
|---|---|---|---|
| Midges (all stages) | #18–24 | High ⭐⭐⭐⭐ | All day — fussy rises and soft takes |
| Blue-winged Olives (Baetis) | #18–22 | Moderate ⭐⭐⭐ | Low light, late morning to early afternoon |
| Small stonefly nymphs (early instars) | #8–14 | Light ⭐⭐ | Midday along rocky runs |
| Caddis (minimal) | #16–20 | Very light ⭐ | Occasional evening activity |
Recommended Flies (spring, cold-water emphasis)
Nymphs — deep, weighted and euro-style
Primary approach: tungsten flies and tight, high-angle presentations. Run two flies when possible (heavier point, lighter trailer) or single heavy perdigon for fast sinks.
- Egan's Thread Frenchie Jig - Olive (Jig nymph — excellent as a point fly for deep seams) — Rank 4
- Egan's Frenchie (classic beadhead nymph — versatile leader placement) — Rank 12
- Pheasant Tail Tungsten (skinny, realistic mayfly nymph for indicator or euro rigs) — Rank 16
- Roza's World Spain Perdigon (barbless) (fast-sinking perdigon for deep, clear runs) — Rank 13
Midges — micro-nymphs and tiny beadheads
Midges are the backbone of early-spring feeding. Slow everything down and fish micro-sizes on long leaders.
- Black Zebra Midge (TBH) — tiny tungsten zebra midge for indicator or euro nymphing — Rank 48
- Bling Midge - Black — micro bead midge for subtle takes — Rank 252
- Top Secret Midge — stealth small midge pattern for tight-line / dropper setups — Rank 109
- Jujubee Midge - Olive — well-patterned midge for both stillwater and river-side sighter work — Rank 503
Streamers — slow retrieves, long pauses, and deep contact
When trout key on baitfish or are positioned in deep troughs, slow, deliberate streamer work is deadly. Use sinking tips or weighted streamers to get low and keep it there.
- Egan's Poacher - Olive — excellent anchor/streamer for slow strip and pause; great for deep, tight lies — Rank 1
- Egan's Poacher - Black — darker profile for low-light or stained water — Rank 2
- Coffey's CH Sparkle Minnow Sculpin — sculpin/baitfish imitation for deep runs and structure — Rank 7
- Sculpzilla - Olive — articulated sculpin imitation for slow retrieves along the bottom — Rank 65
- Balanced Leech - Black — slow swing and twitch, powerful on low-light days — Rank 58
Emergers / Blue-winged Olive (BWO) — tight dry/emergent combos
Fish the surface or near-surface with parachute/emergers in calm windows; pair with a small nymph trailing or beneath an indicator during mixed activity.
- Parachute - Blue Wing Olive — classic surface indicator and emerger match — Rank 31
- Barr's Flashback Emerger - BWO — perfect for tight emerger presentations — Rank 72
- Antonio's Adult BWO — adult pattern for selective rises — Rank 102
- Egan's Silver Bullet - Baetis — beadhead/euro styles for deep nymph-to-emergers — Rank 36
Tactics & Tips — cold-water strategies (what to fish and how)
- Deep indicator nymphing: Two-fly rigs with a heavy point fly (tungsten jig/perdigon) and a lighter trailing nymph. Set your indicator so the point fly runs the bottom 6–12 feet depending on current and run depth. Suggested sizes: #12–18 (bead), tippets 4X–6X behind leader.
- Tight-line / Euro nymphing: For clear, technical water: use a long, stiff leader/sighter, tungsten perdigons and jigs. Keep slack out and watch subtle sighters — small, short takes are common in cold water.
- Midge strategy: Slow-sink micro-zebra midges and small tungsten midges will out-fish larger, flashier patterns right now. Fish them on long leaders, short drifts, and shallow mends. Use micro split-shot or 1–2 jig flies to reach fish holding just off the bottom.
- Slow streamer work: Use sinking-tip lines or weighted streamers. Slow, 3–6 foot strips followed by a long pause often triggers lethargic trout. Target deep seams, tailouts and the heads of holding pools. If water is very cold, lengthen pauses and fish smaller streamer profiles.
- Emerger & surface play: When BWOs are visible, present parachute/emergers on long tippets (5X–6X). When fish are sipping, swap to a small emerger or micro parachute and shorten leader mends to reduce drag.
- Leader, tippet & rigging suggestions: Indicator rigs: 9–11 ft leader, 4–6 ft nylon leader section to indicator; euro rigs: 10–12 ft light, stiff leader and short tippet connection. Tippet sizes: 3X for heavy nymph leaders to 6X for midge droppers. Use barbless hooks where possible to reduce handling stress.
- Where to fish: Deep seams, undercut banks, inside tails and the heads of pools. In faster water, fish the near-bottom seams with heavier tungsten; in slack water, present thin midge patterns just above the substrate.
- Time-of-day: Midge and BWO activity is often steady — early morning through midday is reliable. Streamer chances increase in low light (morning, evening, overcast) and during cooler water releases.
- Conservation: Water is cold — handle trout quickly and minimize air exposure. Consider shortened fights and immediate release to reduce mortality.
Quick Rig Examples
Point: tungsten jig (#12–14)
Trailer: pheasant tail / Frenchie (#14–18)
Indicator set to run bottom 6–12 ft
Long sighter, short tippet to perdigon (#18–14)
Weight: 2–4mm tungsten; steady, tight-line contact
Indicator or euro sighter with micro midge (#20–24) 18–30" below an attractor
Fish slow, short drifts