Wade34/100
Wading is the most sensitive plan today. Use protected edges only, avoid crossings, and downgrade quickly if clarity or current feels wrong.
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Fly fishing report · West
Mores Creek
A Highway 21 Mores Creek planning page built around close-to-Boise access, stocked-rainbow expectations, and honest calls about low summer water and traffic pressure.
Check flow & weatherToday's river scoreHigh source confidence
54
Caution
Best option: Float.
A float can fit better than wading only if launches, shuttle, boat skill, wind, and local rules all check out.
Updated Jul 13, 11:17 PM UTCUsually refreshes about every 45 minutes
Recommended approachFloat
Mode scores adjust the river-wide score for the risks of wading, bank fishing, or floating.
Bank / edgeCheck
This report does not describe this as a primary mode. Verify legal access, depth, launches, and retreat options before planning around it.
Float · Best fit58/100
A float can fit better than wading only if launches, shuttle, boat skill, wind, and local rules all check out.
Confirm before you leave
Flow and weather right now.
Use the flow trend to confirm the score before you leave. Weather can change the safest and most productive fishing window.
Loading current flow and weather.
River strategy
Mores Creek is a practical quick-trip river when flows and temperature still support it.
This is one of the simplest Boise-area trout options to reach, but it should be approached as an access-friendly small-river day, not a destination-size trophy fishery. Check the flow first, then decide whether you are looking for a short rainbow-and-whitefish session or whether low water and warm afternoons have already cut the window down too far.
- Use RiverReports first for the public chart, then confirm the creek trend with USGS 13200000 above Robie Creek near Arrowrock Dam.
- IDFG says stocked hatchery rainbows provide most of the sport-fishing opportunity here, with kokanee moving into the lower creek in some years.
- Highway 21 pullouts and Forest Service sites like Grayback and Bad Bear make Mores Creek easier to scout than many Idaho foothill streams.
- When summer heat or traffic pressure builds, fish early, keep expectations realistic, and avoid forcing an afternoon window that is already gone.
Why this score moved
HeatLowers score
The NWS forecast is near 92F. Without live water temperature, heat risk needs a conservative check.
FlowUse caution
USGS shows 41 cfs with a stable over about 6 hours trend. same-date USGS history (1951-2025, 75 readings) puts normal around 88 cfs and the lower quartile near 49 cfs; today's flow is below normal for the date. This is below normal, so edge depth, temperature, and pressure matter.
Best mode nowUse caution
Float: A float can fit better than wading only if launches, shuttle, boat skill, wind, and local rules all check out.
SeasonHelps score
Early summer: Usually the easiest blend of access, flow, and stocked-fish opportunity.
Public alertsHelps score
No active NWS alert was returned for this forecast point.
Read the water
What changes the plan.
Mores Creek is strongest as a fast-planning local trout day in spring, early summer, and cooler fall windows. It is weakest when anglers treat a small accessible creek as if it should fish big all day through hot weather and low water.
Cool moderate flow
The best condition for short dry-dropper or light nymph sessions along the Highway 21 corridor.
Low clear flow
Fish early, downsize, and focus on shade, current seams, and undercut banks.
Runoff color
Treat the creek as a scouting stop or move on; small roadside water gets hard to read quickly when color rises.
Hot late-summer afternoons
If the water feels too warm or shallow, shorten the trip or skip it rather than forcing trout to pay for a marginal window.
Field plan
Fish it with intention.
Best flows
Cool moderate flows that keep roadside pockets alive without burying the creek in runoff color.
When to skip
Skip when hot afternoons, shallow water, or muddy runoff turn the creek into a temperature or visibility compromise.
Local plan
Fish early, start at one official access like Grayback or Bad Bear, and build the day out from the first stretch that still has cool moving water and clean holding seams.
Backup water
If Mores Creek looks too thin or warm, switch to Boise River for bigger water or plan a cooler remote option like Deadwood instead of trying to squeeze a bad window.
Hatches & flies
Bring a flexible box.
TimingWhat to watchUseful flies
SpringMidges, BWOs, and small caddisZebra midge, BWO nymph, caddis pupa, hare's ear
Reviewed pattern · report says “Zebra midge”Zebra MidgeLook for a very slim tapered thread body, evenly spaced contrasting wire rib, a small bead, and no tail or wing. The reviewed classic is black with silver wire and a silver bead. Red, olive, brown, glass-bead, jig-hook, resin-coated, or tailed forms must remain labeled variations rather than replacing the classic identity.See photos & how to fish it ↗
Reviewed family · report says “BWO nymph”Blue-Winged Olive PatternsBWO describes a hatch group, not one fly. Nymph, emerger, dry, cripple, and spinner profiles must stay separate because they occupy different parts of the water column.See family guide ↗+ 2 more reviewed guides in the Fly Box Early summerCaddis, PMDs, and attractor windowsElk hair caddis, PMD dry, stimulator, pheasant tail
Reviewed pattern · report says “Elk hair caddis”Elk Hair CaddisLook for a tented elk- or deer-hair wing, clipped hair head, dubbed body, rib, and hackle palmered along the body. The body color should be labeled because tiers often match different natural caddis colors.See photos & how to fish it ↗
Reviewed family · report says “PMD dry”Pale Morning Dun PatternsPMD names an insect group, not one fly. Pale nymphs, trailing-shuck emergers, upright or low-riding duns, cripples, and spent-wing spinners stay visibly separate.See family guide ↗+ 2 more reviewed guides in the Fly Box SummerTerrestrials and evening caddisAnt, beetle, hopper-dropper, caddis soft hackle
Reviewed family · report says “Ant”Ant PatternsAnt patterns can be foam, fur-bodied, winged, or sunken. The narrow waist and paired body lobes matter more than one material recipe.See family guide ↗
Reviewed family · report says “beetle”Beetle PatternsBeetle flies range from simple foam shells to hair-bodied and sunken forms. A rounded back and compact profile distinguish the family from ants and hoppers.See family guide ↗+ 1 more reviewed guide in the Fly Box FallBWOs and midgesParachute BWO, RS2, zebra midge, small bugger
Reviewed family · report says “Parachute BWO”Blue-Winged Olive PatternsBWO describes a hatch group, not one fly. Nymph, emerger, dry, cripple, and spinner profiles must stay separate because they occupy different parts of the water column.See family guide ↗
Reviewed pattern · report says “RS2”RS2Start with the beadless architecture: two dark-dun Microfibett tails separated behind a slim, tightly twisted and visibly segmented dubbed abdomen; a fuller thorax; and saddle-hackle web clipped into a short angled wing bud. Rim Chung's original-style form uses natural beaver dubbing and hackle web. CDC- or Antron-wing ties, beads, curved hooks, flash, and tailless Avatar-style flies must remain labeled variations.See photos & how to fish it ↗+ 2 more reviewed guides in the Fly Box 01
Approach Mores Creek as a collection of short productive stops, not as an all-day march through identical roadside water.
02
Fish the first clean pocket or undercut seam well before moving because access convenience can trick you into rushing.
03
Start early in warm weather and give up sooner if the creek looks too skinny or too warm.
04
Keep expectations aligned with a close-to-town stocked-trout creek and you will usually fish it better.
Access & responsibility
Know the entry. Know the exit.
IDFG lists no special rules for Mores Creek under the 2025-2027 fishing planner, so Southwest Region general bag limits apply. The same planner also notes that stocked hatchery rainbow trout provide most of the regular opportunity here.
Grayback Campground reach
A solid official Forest Service anchor above Idaho City with direct creek access below camp.
Bad Bear Picnic Area and Campground
Useful lower-corridor access where the creek runs right along Highway 21.
Highway 21 pullout water
IDFG's directions make clear that much of the creek is reached through roadside pullouts, which is the core strength of this fishery.
Transparent sources
Check the facts behind the plan.
Last material review: 2026-06-02
flowRiverReports: Mores CreekflowUSGS monitoring location: Mores Creek above Robie Creek near Arrowrock DamregulationIdaho Fishing Planner: Mores CreekaccessBoise National Forest Grayback Campground and Group SitesaccessBoise National Forest Bad Bear Picnic AreasafetyNational Weather Service forecast point near Mores Creek
Common questions
Before you leave.
Is Mores Creek worth fishing as a fly angler?+
Yes, when you treat it as a practical close-to-Boise trout creek with realistic expectations instead of a destination-sized river.
What should I watch most closely here?+
Watch flow, water temperature, and how much pressure the Highway 21 corridor is taking that day.
What gauge should I use for planning?+
Start with RiverReports and USGS 13200000 above Robie Creek near Arrowrock Dam for the broad corridor trend.