Rules at a glance
- Fly only
Water temperature for Cutthroat Trout
Cool — slow9°C est.ideal 9–15°C
0°14°28°
How to fish it · for Cutthroat Trout
When
Nymphing can work through most of the day.
Where
Cover mixed depths.
Method
Start with tight-line nymphs and adjust if fish rise or drift higher.
Kit
9 ft #4 rod, floating line, 12 ft tapered leader to 4–5 lb fluoro tippet.
Why this works
Good — water clarity is right today, though insect activity could be better.
Likely species
Mayflies
Mayflies
Chironomids
Gammarids
Hatch timeline · todayPeak at 11h
12h(now) — Western Blue-Winged Olive
Stage: On emergersApproach: Emerger or dryActivity: 41%
Also:Black Midge37%
Peak emergence window5 food groups active
Peak activity at 11h — Western Blue-Winged Olive (Western Blue-Winged Olive, Peak emergence window)
Sub-surface · on the nymphunder the surface
Hatch predictions
Supporters see the full sub-surface read.
Start free trial14-day free trial. Cancel anytime.
Beyond the hatch · worth watchingambient prey(1)
Hatch predictions
Supporters see what else is on the menu.
Start free trial14-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
1
2
2
2
2
2
2
2
2
2
2
1
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
Fly box · Cutthroat Trout
2-6 · Pattern
Proven pattern for this period
Permits & access
Permit required — see local rules.
- Open all year (statewide default)
- Verify current UDWR gear/limit rules
- Native Colorado River cutthroat in the headwaters and tributaries are conservation-sensitive — handle with care
- Access lower down is complicated by irrigation diversions and private ground; fish verified public reaches and confirm before promoting any stretch.
What's coming
Plan ahead
5-day outlook
Other water nearby · 3
Gallery · 2
Terrain map
The full read · show the working · for Cutthroat Trout · confidence 90%
How the 78 is built — score × weight = contribution
Temperature82 × 28%23.0
Flow80 × 22%17.6
Clarity85 × 18%15.3
Feeding Time75 × 13%9.8
Pressure75 × 7%5.3
Insect activity62 × 12%7.4
Conditions total= 78
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitymodelled from regional profilemodelled
Directions
Seasons & zones
- Trout 1 January → 31 December
Related guides
Booking & contacts
Duchesne River
Water temperature for Cutthroat Trout
Cool — slow9°C est.ideal 9–15°C
0°14°28°
How to fish it · for Cutthroat Trout
When
Nymphing can work through most of the day.
Where
Cover mixed depths.
Method
Start with tight-line nymphs and adjust if fish rise or drift higher.
Kit
9 ft #4 rod, floating line, 12 ft tapered leader to 4–5 lb fluoro tippet.
Why this works
Good — water clarity is right today, though insect activity could be better.
Likely species
Mayflies
Hatch timeline · todayPeak at 11h
12h(now) — Western Blue-Winged Olive
Stage: On emergersApproach: Emerger or dryActivity: 41%
Also:Black Midge37%
Peak emergence window5 food groups active
Peak activity at 11h — Western Blue-Winged Olive (Western Blue-Winged Olive, Peak emergence window)
Sub-surface · on the nymphunder the surface
Hatch predictions
Supporters see the full sub-surface read.
Start free trial14-day free trial. Cancel anytime.
Beyond the hatch · worth watchingambient prey(1)
Hatch predictions
Supporters see what else is on the menu.
Start free trial14-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
1
2
2
2
2
2
2
2
2
2
2
1
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
Fly box · Cutthroat Trout
2-6 · Pattern
Proven pattern for this period
Permits & access
Permit required — see local rules.
- Open all year (statewide default)
- Verify current UDWR gear/limit rules
- Native Colorado River cutthroat in the headwaters and tributaries are conservation-sensitive — handle with care
- Access lower down is complicated by irrigation diversions and private ground; fish verified public reaches and confirm before promoting any stretch.
What's coming
Plan ahead
5-day outlook
Other water nearby · 3
Gallery · 2
Terrain map
The full read · show the working · for Cutthroat Trout · confidence 90%
How the 78 is built — score × weight = contribution
Temperature82 × 28%23.0
Flow80 × 22%17.6
Clarity85 × 18%15.3
Feeding Time75 × 13%9.8
Pressure75 × 7%5.3
Insect activity62 × 12%7.4
Conditions total= 78
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitymodelled from regional profilemodelled
Directions
Seasons & zones
- Trout 1 January → 31 December
Related guides
Booking & contacts