I spotted smoke deeper in waterton canyon last weekend - and within 30 seconds decided it was 911 worthy.
i had good vantage of it all from the flanks of goat mtn - which i like to bust up sometimes in summer even though i couldn't take that thing entirely in the heat.
this is what i 1st saw

note the chopper

whole scene

it was actually pretty epic for me - because of that great vantage i had told the 911 operator to have them call back if they needed more help spotting - and they did call. i tried to give position relative to goat mtn and also followed up with a few pics too. and i pushed myself to one higher ridge to get that much better look .
by the end - i was pretty invested in this thing. i was about to tell the firefighters staging on my way back "hand me a shovel, I'm ready to jump in this thing!"