Glen Pass is a trap on paper because it sits at 11,978 feet versus Kearsarge at 11,760, but the real killer is the west side. That descent drops you into the bighorn plateau area with zero tree cover, so when the weather turns you are just a lightning rod standing in the open. I made the same call on a JMT thru in 2019 and got caught in a cell that dumped pea sized ice for close to an hour before I could even get my rain shell out. The map shows a shorter line but it does not show you the exposure or the way those storms funnel up the canyon.