INDIO, Calif. -

A woman's death over the weekend in the Riverside County portion of Joshua Tree National Park was likely heat-related, a park spokeswoman said Monday.

The 56-year-old woman was with family members who set out at 10 a.m. Saturday for the Mastodon Peak Trail and Lost Palms Oasis, according to Joshua Tree's Jennie Albrinck.

On the return hike, the woman ``began suffering from heat-related symptoms, and lost consciousness,'' Albrinck said.

Her husband went ahead to get help, while other members of the group remained with the woman, whose name was withheld.

A park ranger responded at 2:25 p.m. and determined the woman had no pulse and was not breathing, Albrinck said. The ranger began CPR and also called for a helicopter.

Meanwhile, first responders and additional park staff arrived, but the woman was pronounced dead before she could be transported to a hospital.

According to Albrinck, temperatures were around 100 degrees in the park
on Saturday.