News Release

Information Sought on Missing Person in Glacier National Park

Photo of 66-year-old missing man, Mark Sinclair

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News Release Date: July 10, 2019

Contact: For Media Inquiries, 406-888-5838

Contact: To report a possible sighting, 406-888-7077

West Glacier, MT – Glacier National Park is asking for the public’s help to locate a missing person.

Mark Sinclair, 66, was last seen at approximately 2:30 pm on Monday, July 8 on the Highline Trail at Rimrocks headed west.

Park staff working in the Logan Pass Visitor Center observed him leaving an unsecured vehicle, keys, and dog in the Logan Pass Parking Lot.

Sinclair was wearing all gray or nondescript clothing (possibly in shorts), a yellow bandanna around his neck, a gray waist fanny backpack, and no hat. His hair is completely white and he may have a beard that is white as well. He is 5’8’’ and approximately 155 lbs.

If you have information about the missing person, please call 406-888-7077.

Sinclair is a recent resident of Whitefish, MT, and worked for a period of time earlier this summer at Glacier National Park.

Search efforts began on Tuesday morning, July 9, and are continuing by ground and air.

Last updated: July 11, 2019

Contact the Park

Mailing Address:

PO Box 128
West Glacier, MT 59936


(406) 888-7800

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