3 one hour weekday rides, and 2 2-3 hour rides on the weekends is plenty of training time for the length of most events in the U.S.

That's 7-9 hours of training. you just have to make the most out of the one hour rides so that there's a lot of quality work in them.

You can do 2 days of intervals during the week (varying the type based on where your at in your training) and then one competitive group ride or race ( or long ride with some intervals) and one endurance ride on the weekends.

That's enough training to be competitive, with the possible exception of some longer P,1,2 road races.