Coastal Rain River · Mixed · Northern California, US

Mad River

Mad River from rail trail trestle, October 2023

A Humboldt steelhead river close to Arcata, heavily shaped by winter rain and by the exact regulation status on the day.

Tomorrow · Slow going — pick your moments
Sculpin Streamer
Forecast · Tomorrow
Slow going — pick your moments
Slow going — pick your moments and do not force it.
45% projected
Today's fly
Sculpin Streamer
Sculpin Streamer
Conditions on the water · Tomorrow
Live gauge
Level
Rising
1.74 m
Lifting fast
Water temp11.0°C
ClarityVery coloured
Weather12°C
WindN 19 km/h
Pressure1020 hPa
Rain · recent1.0 mm
Rain · ahead0.0 mm

The nearest gauge doesn't record temperatures, so we've estimated it — defer to the river keeper's advice.

Water temperature for Steelhead
Ideal
11°C est.ideal 4–13°C
0°14°28°
How to fish it · for Steelhead
When
Winter steelhead when open, green and dropping
Where
A Humboldt steelhead river close to Arcata, heavily shaped by winter rain and by the exact regulation status on the day.
Why this works
Excellent — water temperature is right today, though time of day could be better.
Likely species
Hatch timeline · tomorrowPeak at 9pm

12pm(now) — Mahogany Dun

Stage: On emergersApproach: Emerger or dryActivity: 44%
Peak emergence windowWeather boost5 food groups active

Peak activity at 9pm — Brown Dun (Brown Dun, Weather boost)

Sub-surface · on the nymphunder the surface

Hatch predictions

Top nymph shown — see all 2 guilds as a supporter.

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14-day free trial. Cancel anytime.

Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

Top prey shown — see all 3 as a supporter.

Start free trial

14-day free trial. Cancel anytime.

Evidence
Records-basedModerate confidence

Based on species-occurrence records, not local invertebrate surveys.

Through the year
0–3 scale · October highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
2
2
2
1
1
2
2
2
Brown DunHatch
2
3
3
3
3
3
3
2
Western Green DrakeHatch
2
2
Flav (Small Western Green Drake)Hatch
2
3
2
Mahogany DunHatch
2
2

Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.

Ranked for today
Steelhead fly box
SS
Stu's Mini-IntruderTop
12–16 · Fly
A dependable searching pattern for these waters.
HB
Hoh Bo Spey
12–16 · Fly
A dependable searching pattern for these waters.
SC
Sculpzilla
12–16 · Fly
A dependable searching pattern for these waters.
BS
Brett's Klamath Intruder
12–16 · Fly
A dependable searching pattern for these waters.
Permits & access
Permit required — see local rules.
  • CDFW North Coast low-flow rules apply; threshold is 200 cfs at Mad River near Arcata
  • Verify current rules before any hatchery/wild distinction is displayed.
What's coming
Plan ahead
5-day outlook
Other water nearby · 3
Gallery · 2
  1. Mad River from rail trail trestle, October 2023
  2. Terrain map of the venue
    Terrain map
About this water

A Humboldt steelhead river close to Arcata, heavily shaped by winter rain and by the exact regulation status on the day. It is not a subtle product call: tell anglers whether it is open, whether it has enough colour and whether it is falling. Everything else comes second. These are steelhead and salmon waters managed by CDFW under strict, frequently-changing seasonal rules — salmon retention is often prohibited and catch-and-release is widely required; check current CDFW regulations before fishing.

  • Mixed
Conservation note

Wild steelhead and listed salmonid recovery context. Separate any hatchery-retention information from wild-fish handling and verify before display.

Why this score · for Steelhead
  • Temperature10028% weight
  • Flow8022% weight
  • Clarity9518% weight
  • Feeding Time4513% weight
  • Pressure757% weight
  • Insect activity6912% weight
Directions
Seasons & zones
  • Trout 1 September → 30 April
Related guides
Booking & contacts