An aerial shot of the Teslin River wildfire, 60 kilometres northeast of Whitehorse, shows it's spread to both shores. (Yukon Wildland Fire Management)

Yukon wildfire officials on Thursday urged paddlers to avoid the Teslin River, while firefighters keep watching a large blaze in the area.

The forest fire, which has been burning in a remote area 60 kilometres northeast of Whitehorse for almost a month, is currently close to 2,000 hectares in size.

Wildfire officials say the blaze jumped across the river earlier this week and is now burning on both sides.

"We know that that's a popular paddling area. So we're just asking paddlers to avoid the area if possible," fire information officer George Maratos told CBC News on Thursday.

For anyone who still plans to paddle on the river, Maratos has several recommendations:

• Don't stop, under any circumstances, in the fire area.
• Paddle in the middle of the river.
• Limit travel through the fire area to the morning hours.

The fire is most active during the middle of the day and the early evening, Maratos said.

Fire officials are monitoring the blaze but are not fighting it because it is burning in a remote wilderness area.

Meanwhile, a number of wildfires remain active in the Carmacks and Dawson City areas.

A fire burning 90 kilometres south of Dawson is now about 31,000 hectares in size, burning on both sides of the Stewart River.

Crews aren't fighting that blaze either but are working to protect a building in the area.

Three other fires are burning in central Yukon.