A fire believed to have started at a target-shooting range south of Salt Lake City, Utah, grew to 6,000 acres but appeared to be less of a threat to homes, officials said Saturday.

Nearly 600 houses with about 2,000 residents were evacuated after the Dump Fire started Thursday morning near Utah Lake, said incident spokeswoman Kim Osborn.

No homes in the Eagle Mountain and Sarasota Springs communities have been destroyed by the fire, which tore through grass, sage brush and juniper. It was 30% contained Saturday.

"The conditions are better today," Osborn told CNN. "They are meeting to decide when they will lift evacuations. It's looking really positive."

About 450 people were on hand to fight the fire, with a new team arriving Saturday.

Restrictions were being placed on the shooting range, according to Osborn.

"They can't prevent people from shooting, but they can prevent them from using explosive targets and bullets that tend to spark more."

Meanwhile, fire activity was expected to kick up Saturday afternoon in the massive High Park Fire in northern Colorado. It has swelled to 75,500 acres.

The blaze, which was 45% contained, has destroyed 191 homes west of Fort Collins. Numerous homes were saved Friday, said incident commander Bill Hahnenberg.

CNN iReporter David Thrush of Eaton said he occasionally smells the fire and has seen ash accumulate on his clothes and cars, depending on the direction of the wind. Eaton is about 30 miles from the fire.

A 20-acre fire in Estes Park burned some structures and closed the main entrance to Rocky Mountain National Park, officials said.