Google has partnered with Rails-to-Trails (RTC), a nonprofit focused on creating a network of trails from former rail lines, to add biking directions to Google Maps. Google Maps now has biking route details for more than 150 U.S. cities covering more than 12,000 miles of trails and bike lanes. Google says it plans to continue to add new trail information to Google Maps and is requesting feedback from riders via the " Report a Problem " tool.