Chalk Creek (Nathrop to St. Elmo)

Chalk Creek (Nathrop to St. Elmo) — Fishing Report for April 27, 2026

Quick Stats

Flow: 21 CFS | Trend: Rising sharply (+15% in 24h) | Fishability: Poor | Weather: Slight chance snow showers, high 55°F

The Bite

This is a tough week to be eyeing Chalk Creek. Snowmelt is underway in the upper drainage, and the gauge has jumped 15% in the last 24 hours — a trajectory that points toward off-color, rising water through the week. Overnight lows in the upper 20s will slow the melt slightly each morning, but afternoon warmth into the mid-50s will keep the pulse going. Water temps aren't available from this gauge, but given the snowmelt inputs and overnight freezes, expect something in the mid-to-upper 30s — cold enough to suppress fish activity even if the flows were cooperative.

The broader basin context adds weight to the caution flag: snowpack is sitting at just 11% of normal and water-year precipitation is at 62% of normal — a genuinely dry year. The silver lining is that runoff on a small freestone like Chalk Creek should be shorter and milder than in a big snow year. Don't expect a prolonged blowout — but this week isn't the week to test it. The creek will likely come back into shape earlier than usual, potentially by mid-to-late May.

For now, the honest call is to redirect your energy. The main Arkansas River between Salida and Buena Vista is in its pre-runoff window — BWO and midge hatches are active on the bigger water, flows are still manageable, and the fish are far more accessible than anything Chalk Creek can offer right now.

What to Fish

• Zebra Midge, #22–24 — Point fly in a double-nymph setup on the Arkansas; dead-weight anchor with a lighter dropper above
• RS2 (olive or gray), #20–22 — Trailing dropper 12–16" above the midge; natural drift through slower seams
• Parachute Adams, #16–18 — Dry-dropper anchor if BWO activity picks up midday on the Arkansas
• Soft-hackle Pheasant Tail, #16–18 — Swing through the tailouts during any BWO emergence window
• Copper John, #16 — Weighted point fly for deeper runs on the Arkansas if flows are pushing

Tactics & Rigging

If you make the drive and want to probe Chalk Creek anyway, stick to the slower inside bends and pocket water behind larger boulders — anywhere the current is broken and silt hasn't settled in. A single small beadhead nymph like a Hare's Ear in #14–16 on 5X tippet, fished tight to structure with a short-line presentation, is your best shot. Don't expect much. The fish are there, but cold water and rising flows put them in a survival posture, not a feeding one.

For the Arkansas, rig a size 22 Zebra Midge on point with an RS2 dropper 14" above it on 6X fluorocarbon. Fish the slower inside lanes and tailouts — the fish will be stacked where the current does the least work. Watch for BWO activity between noon and 3 PM if cloud cover builds; that's when a Parachute Adams with a soft-hackle dropper trailed 18" behind it can produce on the surface.

Access & Logistics

Chalk Creek Road off US-285 at Nathrop provides access to the lower stretch. The road is passable but expect soft shoulders and some mud with the freeze-thaw cycle this week. Crowds are nonexistent — you'll likely have the creek to yourself, for whatever that's worth right now. Verify current regulations with CPW before fishing, as rules can change year to year.

Stop by ArkAnglers or Salida Anglers for flies, current Arkansas intel, and to support the shops that keep these fisheries healthy.

Looking Ahead

With overnight lows staying in the upper 20s through Wednesday and afternoon highs in the mid-50s, expect Chalk Creek to continue its slow rise through the week. The dry water year suggests a shorter runoff window than normal — keep an eye on the gauge in mid-May for the creek's return to form.