South Boulder Creek

Flow now

Boulder Creek At North 75th St. Near Boulder, CO, 5 mi from the river.

2cfsat build, Nov 12, 11 AM MT

The typical week here, from 10 years of record: 6 cfs to 18 cfs, around 10 cfs.

Also gauged at Left Hand Creek At Hover Road Near Longmont, CO: 4 cfs, Nov 12.

Snowpack

0.2 in of water in the snow at Niwot and 2 more stations, against a median 1.4 in for the date (14 % of normal).

The snowpack here usually builds from Oct 22, peaks Apr 19 and is gone by May 31; runoff follows the melt.

The season, November

Usually workable this week. Pick your window and fish it well.

• Midgessizes 18 to 22
• Small eggs and worms
• Pheasant tail and zebra midge nymphsunder an indicator

Typical for the week over 10 years: 5.9 to 18 cfs. Running 2.2 cfs today, below that range. Flows are not forecast; check the gauge the day before.

Brown Trout are spawning (October to December). Stay off clean, light-coloured gravel in riffle tails and pool tailouts, and leave paired fish alone.

Brook Trout are spawning (September to November). Stay off clean, light-coloured gravel in riffle tails and pool tailouts, and leave paired fish alone.

Mountain Whitefish are spawning (October to December). The egg bite behind spawning whitefish is the best winter nymphing of the year: an egg pattern below the riffles.

• Flows swing a lot this week most years. Carry both a heavy nymph rig and a dry-dropper and let the gauge decide.
• Egg patterns in the runs below the spawning gravel, never on it.

Written by the app's rules engine from the calendar, the gauge record and the snowpack, not by hand, so it says only what the data says. The weather for the week comes with the app.

Fly shops on this water

• Rocky Mountain Anglers BoulderWebsite

Nearby waters

• Boulder Creek6 mi
• St. Vrain Creek16 mi
• Bear Creek24 mi
• Big Thompson River30 mi
• Fall River36 mi
• North Platte River43 mi
• South Platte River47 mi
• Cache la Poudre River49 mi

Every Colorado water