Boulder Creek at Mouth near Longmont flow today
Streamflow at USGS station 06730500, in the South Platte basin (Division 1).
About this gauge
Boulder Creek at Mouth near Longmont is one of the 68 stream gauges BasinMind reads for the South Platte basin, Division 1 of Colorado's seven water divisions. It is USGS station 06730500 (40.1388, -105.0202), and the official record is on that station's page.
At Oct 4, 2026, 1:00 p.m. MT it read 0.3 cfs, about 0.7 acre-feet a day. USGS publishes no daily median for this gauge, so no percentage is shown.
On the Boulder Creek, the nearest gauge BasinMind reads is Boulder Creek at North 75th Street near Boulder upstream.
Across Division 1, DWR lists 21 active calls; the most senior is Howard Ditch on South Boulder Creek, priority Apr 1, 1860 (the full list). A call governs the stretch of river it is placed on, so look for this river in the list.
One cfs is a cubic foot of water passing each second, about 448.8 gallons per minute; percent of median compares today's flow with the median for this date (cfs and acre-feet). How calls work: What is a water call?.
Main-stem gauges in the South Platte basin
- South Platte River above Cheesman Lake
- South Platte River below Brush Creek near Trumbull · 83 cfs
- South Platte River below Union Avenue at Englewood · 11 cfs
- South Platte River at Englewood · 22 cfs
- South Platte River at 64th Avenue, Commerce City · 36 cfs
- South Platte River at Fort Lupton · 135 cfs
- South Platte River at Fort Morgan · 146 cfs
More gauges on the Boulder Creek
Reservoirs in the South Platte basin
- Horsetooth Reservoir
- Carter Lake
- Chatfield Reservoir
- Cherry Creek Reservoir
- Spinney Mountain Reservoir
- Button Rock (Ralph Price) Reservoir