Concord-Boxboro 50 Mile Advanced / Fast Ride

This is a longer route for anyone training for centuries and/or charity event this summer. There is a bit of everything from rolling hills, challenging climbs and long stretches of flatter sections ....We will ride promptly at 9:00 AM!! From the Monument / water fountain not the parking area on Keyes Rd...
This is a 49 mile route on (mostly) Well paved back roads through the towns of Concord, Acton. Boxboro, Littleton, Westford & Chelmsford and Carlisle. The route is a continuous series of rolling hills with several moderate climbs.
We'll plan to regroup at the top of hills and long climbs, For anyone needing to refill water bottles or use facilities we can stop at mile 23, 36 and/or 39 if necessary. Please only sign up if you're confident in your ability to maintain at least a 15 mph rolling average for 15 mile intervals.
The route map can be found here. If you cannot download it to a device or print a cue sheet please let me know at least 24 hours ahead of time. The route map and files can be found here: https://ridewithgps.com/routes/33457043
*Helmets are required. Hi-Vis Clothes and lights( front & rear) are strongly recommended.
**PLEASE have some form of navigation in the event you are separated or fall too far behind the group.