The Martinez family picnic ended at 8:37 p.m The picnic began at 4:53p.m.

How long did the picnic last?

The picnic lasted 3 hours and 44 minutes.

To find this, we subtract the starting time (4:53 p.m.) from the ending time (8:37 p.m.):

8:37 - 4:53 = 3 hours and 44 minutes.