Green, yellow, red route

We classified routes by difficulty: each step can be a mix of green, yellow, red tracks:

• Green tracks are designed for the occasional cyclist who is starting to experiment with out-of-town rides. Their composition can include a mix of cycle paths, low-traffic roads and dirt roads in good condition. Differences in altitude and climbs remain limited.
• Yellow tracks are intended for all those who have already brilliantly tackled the green routes. There may be asphalt roads with critical traffic only for short stretches (functional to guarantee a minimum mileage, access to train stations, …). Differences in altitude and climbs may increase. The dirt road, if present, may have some bumpy sections (perhaps to be done by pushing).
• Red tracks are limited to those who have memorized the yellow ones. Elevation gain, gradients, terrain, and exposure to traffic may present problematic, if not downright hostile, sections. Unless otherwise noted, they are on this site for a reason: beauty justifies the hassle.