If you are not a Google Maps fan then Mapquest could be an alternate.

New API of the Week: MapQuest Bike Route API
from ReadWriteWeb by Klint Finley
MapQuest, owned by AOL, has taken backseat to newer mapping services like Google Maps and Bing Maps of late. But the venerable driving directions site added some exciting new data to its open API: bike routing information. Users and developers will now be able to access routes optimized for biking through MapQuest’s Open Directions Service. …

No more news for today. The weather is due to clear up in southeast Texas so I may get to ride tomorrow evening.