In the city of Allentown, it receives Jordan Creek, just before flowing into the Lehigh River.
The Little Lehigh has 88.8 square miles (230.0 km2) of drainage area in Lehigh County and 18.7 square miles (48.4 km2) of drainage area in Berks County.
The Little Lehigh forms a linear park in Allentown and Emmaus.
Sections of the stream are designated for catch and release fly fishing only.
There are extensive equestrian trails running along the stream through the park used by riders, runners and walkers.