Back in the 70s before the Restricted Area limited altitude, I would routinely fly across the canyon a couple of thousand feet above the rim elevation, all times of the year.
It was beyond beautiful and ethereally awesome! Especially with snow.
Yeah yeah I know...me and my 182 were making noise.
In January at dusk on a day when the OAT was -20, there was no one down there to hear it. Just me and the deer.
what are altitude restrictions currently?