Up until a few weeks ago I could pedal to the Tuesday nighter. About 8 miles one way, race 2 races and back home made for a 55-60 mile evening. But, alas, it's at a new location now so I have to drive ~30 minutes in traffic. Same for the Wednesday and Thursday nighters.

Weekends, a couple hours, depending on race start times. I haven't done an overnight racing weekend yet this year but many Texas racers do, since most of the races are in / near Austin / DFW / Houston.