Which sentence or sentences have correct parallel
structure?
Getting from my English class to my
science lab requires me to go down
the stairs, across the quad, into the
science building, and down the
corridor to the lab-all in three
minutes!

Getting from my English class to my
science lab requires me to go down
the stairs, run across the quad, into
the science building, and down the
corridor to the lab-all in three
minutes!