Its February and the weather in Boulder is Great!
Has everyone discovered these websites? There are online mapping tools which can be helpful in mapping out those steady winter/spring bike rides:
Map My Ride and VeloRoutes.org
You may search for an existing route or create a new route. VeloRoutes.org will even track altitude and estimate time by avg mph. These can be helpful tools pre-ride or in mapping a new ride. Once you've ridden it you'll have all the data you need.
Some other mapping sites to map out your new bike route:
UCAR- Steepest grades near Boulder