Firefighters had contained 30 percent of the 333-acre Big Meadows Fire by Thursday night, officials say.

The fire, in Rocky Mountain National Park, is spreading in a hazardous area where 80 percent of trees have been ravaged by beetle kill. The blaze has been whipped by high winds in rugged, steep terrain.

Firefighters battling the fire include two interagency 20-person hotshot crews and 10 fire engines. The air attack includes a small plane, three light helicopters, a medium helicopter and one large heavy helicopter.

The Big Meadows Fire was caused by lightning Monday.

Rocky Mountain National Park remains open.

More fire information is available at