The DeLorme map people just responded to a complaint from my local club about a gross profiling error by their topo profile program. The Rockpile Road profile went under Lake Sonoma instead of taking the bridge over the lake. DeLorme said Oops and welcomed us and others to send profile corrections to a Revisions section of their web site. They said they are constantly working to correct and update the source file. See if their routine works for you.