As part of a Northern Water-led maintenance project, about 80% of the normal surface area will be drained from Boulder Reservoir, popular with boaters and watercraft users.

An event production company has opened registration for a fall marathon and a summer half marathon at the Boulder Reservoir to replace the twice-cancelled Boulder Marathon, but the permits for the ...

The Boulder Reservoir swim area will be closed until at least noon Friday because of elevated bacteria levels. Increased bacteria levels can be attributed to wild animals in the area. The area will… ...

The Boulder Reservoir swim area is closed at least until noon Wednesday because of high levels of bacteria found in the water. Wildlife activity may be the reason for the elevated bacteria levels ...

Hundreds of participants gather at the Boulder Reservoir on Jan. 1, 2015, to brave the frigid waters in the 2015 Boulder Polar Plunge, all to benefit the Boulder County AIDS Project. In the 32nd ...

BOULDER, Colo. — Starting Sept. 1 and lasting until March 2021, crews will drain Boulder Reservoir and limit access to perform required maintenance work that usually happens every five to 10 years.

BOULDER, Colo. — A bit of bad luck and bad timing has hit the Boulder Reservoir as the swim area will be closed through Monday. The swim beach has been closed since Thursday because of elevat… ...