112 mph, 30 deg bank = 3000 ft turn diameter
112 mph, 45 deg bank = 2000 ft turn diameter
112 mph, 60 deg bank = 1000 ft turn diameter

So, if the "canyon" is 2000 ft wide, and they were traveling
up the middle, incredibly difficult to make the turn safely.

www.csgnetwork.com/aircraftturninfocalc.html