Open sky and sharp air tonight, with light air out of the NW with pressure dropping. Activity on Hiwan Number 4 Reservoir should centre on rip-rap and rocky transitions. The best of it runs afternoon into evening. Push the good hours hard and rest through the dead ones. Falling temperatures are switching fish back on.
The bites are average now
Night
Within Jefferson County, Colorado, you have Hiwan Number 4 Reservoir. The surface lies 8,097 feet up. At roughly 3 acres, the whole thing is within casting reach of a single walk. Our Jefferson County list holds plenty of bigger water. Upper Bear Creek is the closest town at 4.5 miles. Then Kittredge, 5.1 miles, and Evergreen, 5.2 miles. The boundary is near enough that local access rules are worth double-checking.
The records we hold are silent on depth, so plan to find it yourself. The arms fish better than the open middle whenever the water is up. Built water gives depth close in, which suits a bank angler. Across Jefferson County, recorded fish include rainbow trout, brown trout and common carp. Read it as a county summary, not a water-by-water list. On this water the quiet end is the one worth the extra effort.
Temperature averages peak at 62°F in July and bottom out at 27°F in January. Temperature moves within a narrow band, and so does the fishing. Cover comes and goes, so treat it with suspicion rather than trust. Autumn steadies things again once the heat lets go. On this water the same rules apply, with local timing.
Whether the bank is open is not something our records settle. Public mapping records no formal access here, so plan for a walk and soft ground. Light line and small metal for the trout; a fly rod earns its place on calm evenings. Take the rules with you rather than trusting memory. Some stretches are reserved and marked as such on the ground. The nearest alternative is Hiwan Number 6 Reservoir, 1.7 miles out. What applies at this water may have changed since it was mapped.
68%
The bites are average now
| 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 |
| 3.8 | 4.8 | 3.5 | 4.6 | 4.1 | 5.1 | 6.7 | 4.7 | 5.4 | 4.1 | 5.8 | 7.5 | 8.9 | 9.4 | 8.2 | 8.4 | 7.2 | 8.1 | 9.3 | 9.9 | 8.6 | 8 | 6.8 | 7.2 |
| 38° | 42° | 42° | 41° | 41° | 40° | 40° | 38° | 43° | 50° | 55° | 57° | 58° | 58° | 57° | 56° | 54° | 49° | 47° | 45° | 42° | 41° | 39° | 38° |
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 30.03 | 30 | 29.99 | 29.98 | 29.99 | 29.98 | 29.99 | 30.01 | 30.02 | 30.04 | 30.06 | 30.04 | 30.03 | 30.03 | 30.02 | 30.02 | 30.05 | 30.09 | 30.13 | 30.15 | 30.18 | 30.19 | 30.2 | 30.21 |
| 51 | 44 | 42 | 42 | 42 | 44 | 44 | 48 | 41 | 33 | 26 | 24 | 24 | 25 | 25 | 26 | 30 | 36 | 36 | 37 | 38 | 39 | 40 | 41 |
Sam
AI Fishing Assistant for Hiwan Number 4 Reservoir
Morning
Afternoon
Evening
Best bite time
Best bite time
Best bite time
Best bite time
Best bite time
Best bite time
Best bite time