SNOFLO- Login
- Climate ►
- Recreation ►
- Tools ►
* AFFECTED AREA...Fire Weather Zones 214, 216, 238, 239, 241, 242, 243, 246 and 247. * TIMING...From Saturday afternoon through Saturday evening. * WINDS...Southwest 10 to 20 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...As low as 9 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire.
Total streamflow across the
Clackamas River
was last observed at
16,490
cfs, and is expected to yield approximately
32,708
acre-ft of water today; about 116%
of normal.
Average streamflow for this time of year is
14,179 cfs,
with recent peaks last observed
on
2015-12-08 when daily discharge volume was observed at
72,200 cfs.
Maximum discharge along the river is currently at the
Clackamas River Near Oregon City
reporting a streamflow rate of 6,990 cfs.
This is also the highest stage along the Clackamas River, with a gauge stage of
27.92 ft at this location.
This river is monitored from 3 different streamgauging stations along the Clackamas River, the highest being situated at an altitude of 1,148 ft, the
Clackamas River Above Three Lynx Creek.
| Last Updated | 2025-04-11 |
| Discharge Volume | 32,708 ACRE-FT |
| Streamflow |
16,490.0 cfs
-1160.0 cfs (-6.57%) |
| Percent of Normal | 116.3% |
| Maximum |
72,200.0 cfs
2015-12-08 |
| Seasonal Avg | 14,179 cfs |
The Clackamas River is an approximately 83-mile (134 km) tributary of the Willamette River in northwestern Oregon, in the United States. Draining an area of about 940 square miles (2,435 km2), the Clackamas flows through mostly forested and rugged mountainous terrain in its upper reaches, and passes agricultural and urban areas in its lower third.
The river rises in eastern Marion County, about 55 miles (89 km) east-southeast of Salem. The headwaters are on the slopes of Olallie Butte in the Mount Hood National Forest, about 10 miles (16 km) north of Mount Jefferson, at an elevation of 4,909 feet (1,496 m) in the Cascade Range. The Clackamas flows briefly north and then flows northwest through the mountains, passing through North Fork Reservoir and Estacada. It then emerges from the mountains southeast of Portland. It joins the Willamette near Oregon City and forms the boundary between Oregon City and Gladstone.
The Clackamas provides hydroelectric power and drinking water for some of the Portland metropolitan area, and it supports runs of Coho salmon, spring and fall Chinook salmon, and summer and winter steelhead. The river's old-growth forests, its habitat for several species of birds, its healthy fish runs, and the recreational opportunities that it provides—such as fishing and whitewater rafting—led to the designation of more than half of the length of the river into the National Wild and Scenic Rivers System (NWSRS). This environment also allowed Native Americans to settle in the river's basin as early as 10,000 years ago.
Regulation of the river began in 1905 with the Cazadero Dam. In 1912, the River Mill Dam intercepted wood and coarse sediment. Later dams at North Fork, Oak Grove, Stone Creek, and Timothy Lake also intercepted wood sediment on the lower river.
