"randall g" wrote in message

There are a number of runways here in British Columbia of around 5000',
which have been regularly used by CRJ's and/or 737's.

5000+ ft seems to be the nominal number floating around for the CRJ, but
with proper configuration and/or load limiting, you can take some fairly
large airplanes into some fairly small places. DCA and LGA are obvious
examples. 727s at Tegucigalpa (TGU), with only about 5600 ft available
after the displaced threshold, and 747s into Marana (6800 ft) are a couple
of others.