It depends on the area, but it's not uncommon to drive more than 30 or 40 miles a day for a work commute in California (especially if you're trying to live in a cheaper area away from where the jobs are located).

At my university, one of my professors told me his commute to campus was about 2 hours, so I'd interpet that to an easy 50 miles from his home (my 4 hour commute to move onto the campus was roughly 100 miles)