Folks in the Grand Valley have called our newsroom asking about the smoke seen out west. Officials tell us it's from the Wolf Den Fire which sparked Friday and has grown rapidly.

The fire ignited at about 20 acres and has grown to an estimated 10,000 acres Saturday evening. Several crews have been assigned to the fire, including four air tankers, a few hot shot crews and several engine crews.

Officials tell us no homes or structures are being threatened at this time. They do say a high pressure gas line is being threatened but has been turned off.

"It's been shut down, but it is still pressurized," on fire official told us over the phone. "This fire remains a priority to fight because of that gas line."

Fire crews say the blaze is located in a very remote area about 35 miles south of Vernal and four miles north of Big Park. The flames, we're told, are burning to the south towards Atchee Ridge.

It is currently burning fast through grass, sage, and pinyon juniper trees. Fire officials say it is 0% contained.