rock-creek

Rock Creek is a creek in Montana.

It ranks #7 among the 17 waters of Montana in the registry, and is of national prominence.

Also called Rock Creek Montana.

Fished for trout (inferred from the species listed).

Species: rainbow trout, brown trout, cutthroat trout and bull trout.

USGS GNIS record: 783452.

Access points: Harrys Flat Campground.

Gillies Bridge to Valley of the Moon (stretch). It is fishable. GRC: 'some of the most storied water on Rock Creek'; Norton Campground at mile 12 starts the Forest Service land.

It is upstream of Valley of the Moon to Mouth.

It is downstream of Forks to Gillies Bridge.

Microburst (hole). It is fishable and wade only. GRC: a famous access point on upper Rock Creek named after a 1989 wind event that downed a forested area; woody debris and side channels.

Valley of the Moon to Mouth (stretch). It is fishable. GRC: lower Rock Creek near the Clark Fork; first 12 miles of Rock Creek Road paved with several fishing access sites.

It is downstream of Gillies Bridge to Valley of the Moon.

Forks to Gillies Bridge (stretch). It is fishable. GRC: above Gillies Bridge and below the West Fork the valley opens into cottonwood and prairie; fast, shallow, braided.

It is upstream of Gillies Bridge to Valley of the Moon.

Gillies Bridge (access). It is fishable.

Norton Campground (access). It is camping and fishable. At mile 12 the paved road becomes gravel and Forest Service land begins (GRC). Also called Norton.

Valley of the Moon (feature). It is fishable. Dividing name between mid and lower Rock Creek in the GRC section heads.

Clark Fork confluence (confluence). It is fishable. Rock Creek meets the Clark Fork near Clinton (shared with the Clark Fork River; not a separate record here).

Dalles Campground (access). It is camping and fishable. EBR lists Harry's Flat, Siria, Grizzly and Dalles campgrounds (first-come first-served). Order along the creek is not stated.

Sourced from 1 independent fly site.

Sources: explorethebitterroot.com, The Grizzly Hackle (retrieved 2026-10-20) and The Perfect Fly Store.

Hatches

Pale Morning Dun

Well sourced.

  1. Jan
  2. Feb
  3. Mar
  4. Apr
  5. May
  6. Jun
  7. Jul hatching
  8. Aug hatching
  9. Sep
  10. Oct
  11. Nov
  12. Dec

A parachute PMD is enough most days in July; lingers into early August until Tricos take over.

Sources: The Grizzly Hackle

Blue-Winged Olive

Well sourced.

  1. Jan
  2. Feb
  3. Mar
  4. Apr hatching
  5. May
  6. Jun
  7. Jul
  8. Aug
  9. Sep
  10. Oct
  11. Nov
  12. Dec

Fall hatch also noted from the second week of September into October.

Sources: The Grizzly Hackle

Hopper (terrestrial)

Stage: adult. Well sourced.

  1. Jan
  2. Feb
  3. Mar
  4. Apr
  5. May
  6. Jun
  7. Jul
  8. Aug hatching
  9. Sep hatching
  10. Oct hatching
  11. Nov
  12. Dec

August is hopper and attractor fishing; hoppers fish well until the first hard frost in mid-October.

Sources: The Grizzly Hackle

Skwala

Stage: adult. Well sourced.

  1. Jan
  2. Feb
  3. Mar
  4. Apr hatching
  5. May hatching
  6. Jun
  7. Jul
  8. Aug
  9. Sep
  10. Oct
  11. Nov
  12. Dec

May activity depends on runoff.

Sources: The Grizzly Hackle

Green Drake

Well sourced.

  1. Jan
  2. Feb
  3. Mar
  4. Apr
  5. May
  6. Jun hatching
  7. Jul hatching
  8. Aug
  9. Sep
  10. Oct
  11. Nov
  12. Dec

From mid-June; still around in early July.

Sources: The Grizzly Hackle

Golden Stonefly

Well sourced.

  1. Jan
  2. Feb
  3. Mar
  4. Apr
  5. May
  6. Jun hatching
  7. Jul hatching
  8. Aug
  9. Sep
  10. Oct
  11. Nov
  12. Dec

From mid-June; still around in early July.

Sources: The Grizzly Hackle

Caddis

Well sourced.

  1. Jan
  2. Feb
  3. Mar
  4. Apr
  5. May hatching
  6. Jun
  7. Jul
  8. Aug
  9. Sep
  10. Oct
  11. Nov
  12. Dec

May emergences are heavy when runoff allows; July evenings bring caddis blitzes.

Sources: The Grizzly Hackle

Spruce Moth

Stage: adult. Well sourced.

  1. Jan
  2. Feb
  3. Mar
  4. Apr
  5. May
  6. Jun
  7. Jul
  8. Aug hatching
  9. Sep
  10. Oct
  11. Nov
  12. Dec

River-wide; lasts two to three weeks; terrestrial moth.

Sources: The Grizzly Hackle

March Brown

Well sourced.

  1. Jan
  2. Feb
  3. Mar
  4. Apr hatching
  5. May
  6. Jun
  7. Jul
  8. Aug
  9. Sep
  10. Oct
  11. Nov
  12. Dec

Sources: The Grizzly Hackle

Trico

Well sourced.

  1. Jan
  2. Feb
  3. Mar
  4. Apr
  5. May
  6. Jun
  7. Jul
  8. Aug hatching
  9. Sep
  10. Oct
  11. Nov
  12. Dec

Follows the PMDs; mayfly activity varies spot to spot.

Sources: The Grizzly Hackle

Mahogany Dun

Well sourced.

  1. Jan
  2. Feb
  3. Mar
  4. Apr
  5. May
  6. Jun
  7. Jul
  8. Aug
  9. Sep hatching
  10. Oct hatching
  11. Nov
  12. Dec

Reliable Mahogany and blue-wing hatches each afternoon from the second week of September; also October.

Sources: The Grizzly Hackle

October Caddis

Well sourced.

  1. Jan
  2. Feb
  3. Mar
  4. Apr
  5. May
  6. Jun
  7. Jul
  8. Aug
  9. Sep hatching
  10. Oct
  11. Nov
  12. Dec

Sources: The Grizzly Hackle

Salmonfly

Stage: adult. Well sourced.

  1. Jan
  2. Feb
  3. Mar
  4. Apr
  5. May hatching
  6. Jun hatching, peak
  7. Jul
  8. Aug
  9. Sep
  10. Oct
  11. Nov
  12. Dec

Peak: begins around Memorial Day; June peak

A famous hatch; usually starts around Memorial Day and is heaviest in June; afternoon flights at peak.

Sources: The Grizzly Hackle

Grey Drake

Well sourced.

  1. Jan
  2. Feb
  3. Mar
  4. Apr hatching
  5. May
  6. Jun
  7. Jul
  8. Aug
  9. Sep
  10. Oct
  11. Nov
  12. Dec

Sources: The Grizzly Hackle

Access, closures and rules change; check with the state agency before you go.