Macaj was hiking Longs Peak in Boulder County on Sunday and last checked in with a friend when he reached the summit around 1 p.m., before dangerous storms moved in and Macaj failed to check in again.

Longs Peak, at 14,259 ft, pokes well above much of the landscape in Rocky Mountain National Park just to the NW of Boulder, here seen in an aerial photo looking directly west. It is named for the ...