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South Boulder Creek

South Boulder Creek has to be one of the most scenic rivers within a half hour of downtown Boulder. This creek starts up in the Indian Peaks near the Moffat Tunnel and gains momentum on its journey towards the cool deep waters of Gross Reservoir. Below Gross Reservoir, South Boulder Creek becomes a great tailwater flowing through the Walker Ranch open space. This area is the most popular section of the creek due to the great hatches and consistent flows through the summer months. The access to this section is fairly easy taking visitors up and over Flagstaff Mountain, onto a dirt road, and into the wilderness.


There is no road following the creek so if you are looking for some solitude this is the spot. The aquatic insect activity in this part of the creek is incredible, it sees hatches of Caddis, BWO’s, PMD’s, Midges and great Terrestrial fishing.  South Boulder Creek might be your best chance for a big wild brown in Boulder County.  Every year anglers routinely catch browns in excess of 18 inches. The river heads east through some public and private water before dumping into Eldorado Canyon State park. After the plunge pools of Eldorado, the creek mellows out upon entering the flats of Boulder and eventually joins Boulder Creek.


Interested in fishing this watershed? Let us know and we will pair you up with one of our local experts.

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Latest Guide Report

Fishing Report Date: 04-21-2016

South Boulder Creek is low and fishing has been more challenging the past week than normal.  Generally we like to fish SBC when the flow is up around 50-150 CFS.  17 is low, fish are spooky, and they are concentrated in the deeper stuff.

You can still get out here, but stealth will be key! If you do go, try fishing light tippet, 6-7x, and use small flies, 20-24.  Small BWO dries and emergers worked for me, as well as small zebra midges in olive.  Dry dropper worked well as long as I didn’t spook fish on the approach.

Keep an eye on the flow and once it comes up, SBC will be back in action,but right now I would recommend going to either Boulder Creek or Clear Creek.  Both have better flows and are fishing much better right now.

Have a great weekend!


Report Statistics
2/5Time on Water:
Number of Anglers:
Hoook Ups:
Fish Landed:
Weather Experienced

Wind Conditions: Calm
Precipitation: None
Water Observations

Water Temperature:
Flow Level: 17 CFS
Runoff? Clear
Zach Lass

Report Submitted By: Zach Lass

South Boulder Creek Water Flow Graphs