50 yards is equal to 150 feet.
To help you visualize, here are some comparisons:
The length of a standard American football field is 100 yards, so 50 yards is half the length of a football field.
A typical city block is around 100 – 200 yards, so 50 yards is roughly half to a quarter of a city block.
The average distance of a golf hole from the tee box to the green can range from 100 to 600 yards, so 50 yards is relatively short, similar to a chip shot.