A 30-year-old Jackson woman drowned Thursday in Yellowstone National Park’s Bechler River after she told three friends she wasn’t feeling well and was going swimming.

A friend found Heidi Llewellyn Smith in 4 feet of water against a log near the Bechler Ford campsite about 5.5 miles from the Bechler Ranger Station. She wasn’t breathing and had no pulse.

The friend ran the distance to the ranger station and reported the incident at 1:45 p.m. Rangers and a medic responded on horseback and in a National Park Service helicopter from Mammoth.

Smith was declared dead at the scene, Yellowstone spokesman Al Nash said.

“Rangers got there and we had help available, but there really wasn’t anything that they could do at that point,” he said.

Nash said the Bechler “at this time of year ... wouldn’t be anywhere near peak flow.”

Smith’s death remains under investigation. A memorial service will be Monday.

This is the first accidental death in the park this year.

In June, a 20-year-old Utah man climbed into the Yellowstone River at the Brink of the Lower Falls overlook and let the current carry him over the 308-foot waterfall.

The Bechler region of Yellowstone is in the southwest corner of the park and is only accessible from Ashton, Idaho, or Grassy Lake Road in Grand Teton National Park.