DENVER (KDVR) — Rangers at Rocky Mountain National Park are searching for a Nebraska man who was last seen in the park on Thursday.

Blake Kieckhafer, 23, of Omaha, Nebraska, was reported missing to park rangers by his family on Monday.

The national park said that Kieckhafer was dropped off by a rideshare service in the Upper Beaver Meadows area of Rocky Mountain National Park on Thursday, Aug. 7, at about 5:20 p.m. The area is about a mile west of the Beaver Meadows Entrance along Highway 36 on the eastern side of the park.

He was wearing a dark-colored t-shirt, dark-colored pants and a dark-colored baseball cap with no logo. The National Park Service said that he was also carrying a small, maroon daypack.

Kieckhafer is described as being five feet, 11 inches tall and weighing approximately 180 pounds, with buzzed/short blonde hair and a mustache, and blue-green eyes.

Anyone with information that could help investigators or who has seen Kieckhafer is asked to contact the National Park Service.

“You don’t have to tell us who you are, but please tell us what you know,” the national park said.

Information can be shared by calling or texting the National Park Service Investigative Services Bureau Tip Line at 888-653-0009, or online at go.nps.gov/submitatip or by email at nps_isb@nps.gov.