The Jackalope Fire was started Thursday by lightning in Saguaro National Park.

Courtesy of the National Park Service

Crews expect to have a small wildfire burning in the Rincon Mountains fully contained by this evening, officials said.

The Jackalope Fire started Thursday by lightning and has burned about 40 acres on Tanque Verde Ridge near Juniper Basin in Saguaro National Park.

The fire is burning in grass, oak and juniper trees, according to a news release from the park.

Crews are fighting the fire to protect nearby Sonoran desert environment. A helicopter has been used to drop water on the blaze.

The Jackalope is one of two wildfire burning in the Rincons. The other, the Deer Head Fire, is being managed to benefit the environment and to burn off ground fuels like grass, pine needs, fallen trees and dead bushes. That fire has grown to about 825 acres since it began July 24.

The area has received rain, which is expected to slow the fires' activity.

For more information about trail and campground closures see the park's Facebook page.