Originally Posted by
340drvr
That area can be extremely busy, between the front range of the mountains, Denver's Class B, with flight schools, gliders, local hobbyists, transient corporate traffic,etc. Lots of small GA airports within 10-20 km, along with Rocky Mt. Metro, mentioned as departure airport for the 172.
RIP.
I was in Boulder for a football game about 10 years ago when there was a mid-air in that same area. No survivors.
Perhaps not a suitable 'see and avoid' airspace...