A wildfire that has already consumed an estimated 300 acres at the U.S. Army’s Pohakuloa Training Area continues to spread northeast along Saddle Road.

According to U.S.. Army Garrison, Hawaii, the fire began around 9:30 a.m. Sunday a quarter-mile east of the training area’s main gate near Mauna Kea State Park.

Police said the fire, near the 33-mile marker, resulting in the closure of the road between the eight-mile marker, above the top entrance of Kaumana subdivision, and the Route 190 intersection in Waimea.

The Federal Fire Department, Civil Defense and U.S. Army Emergency Services spent the day battling the blaze.

No structures are threatened. The cause of the fire has not yet been determined.

On Maui, meanwhile, firefighters finished battling a brushfire near Mokulele Highway.

Battalion Chief Jeff Shaffer told the Maui News the fire had burned about four acres.

The fire was first reported just before 2 p.m. Friday and burned vacant land about a half-mile mauka of the highway. Fire crews reported the blaze under control within several hours, and extinguished it about 11 a.m. yesterday.

The work yesterday was primarily monitoring hot spots, Schaffer said.

“It’s been so dry, we didn’t want to leave any stone unturned.”

Firefighters from Kahului, Wailuku and Kihei fought the blaze near Maui Raceway Park. No injuries or damage to structures were reported.