GOLDEN, Colo. (CBS4) – Golden officials say a 45-year-old man drowned while swimming with his family in Clear Creek on Saturday.

(credit: CBS)

The group was near Tunnel 1 off Highway 6 according to investigators.

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Witnesses tell authorities the man used a rope to tie around his waist, but took the rope off and was swimming freely.

About 30 minutes later, they say they lost sight of him.

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(credit: CBS)

An off-duty Denver paramedic pulled his body out of the water at Kayak Park and started CPR.

More emergency crews arrived who also tried life-saving techniques, but the man died at the hospital.

Investigators say they do not believe drugs or alcohol are factors.

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They say Clear Creek has been running at just under 700 cubic feet per second (CFS) and currently it is at 511 CFS.