Some of our favorites in other countries

US Bicycle Route System
A connected network of bicycle routes is being developed across the United States, with 8043 miles already developed.
http://www.adventurecycling.org/routes-and-maps/us-bicycle-route-system/

National Cycling Network (United Kingdom)
The network passes within a mile and a half of all UK homes and now stretches over 14,000 miles across the length and breadth of the UK.
http://www.sustrans.org.uk/ncn/map/national-cycle-network/about-network

New Zealand Cycle Trails
These trails showcase some of New Zealand’s most breathtaking scenery and diverse attractions. This free network of bike trails caters to passionate cyclists at all levels of fitness and experience.
http://www.newzealand.com/ca/feature/cycle-trails/