Just hiked the new reroute on the Central section of the Rideau Trail. Thanks for being so quick in updating the info here! It really helped with navigation.

Trail 20 is there and indicated on the NCC's official winter trail map. It is infrequently used outside of winter as it crosses a small lake between Trail 9 and Trail 21. Hiking outside of winter requires bushwhacking to get around the water.
http://www.ncc-ccn.gc.ca/sites/default/files/pubs/ncc_winter_trails_map.pdf