I've got two good hills on my commute and I hit them coming and going. Both hills are over 1 1/2 miles of climb. One is over 500' of gain the other is over 600'. In the morning, they are fun. Sometimes they hurt quite a bit in the afternoon after a full day of work.

All the other hills on my commute get lost compared to those monsters (including a 1/2 mile 250' climb on my way home).