Fed Ex sent a 18-wheeler over the “steep, rocky, four-wheel-drive route” that is used to get to Crystal Mill, the famed Colorado landmark..
In 2020, a 30-foot box truck got stuck at nearly 13,000 feet while trying to negotiate the Alpine Loop, which connects Silverton and Lake City..
https://www.denverpost.com/2023/08/29/semi-truck-stuck-county-road-3-crystal-mill/
When it absolutely positively needs to be there over mountain...