Alexander Pisch was last seen on Thursday, October 8, 2020 in the Whatcom County portion of the North Cascades National Park, in the area near Colonial Creek Campground and Diablo Lake. The campground is 30 minutes east of Marblemount, off Highway 20 in Washington State. He was painting at this location and his easel was left behind at the site. His white Toyota Corolla was parked along Highway 20, near where he had set up the easel for painting.