The total ride from midtown is ~85 miles, leaving 06:00 and returning ~11:20. the route is broken into 4 segments, with 5-10 minute breaks in between, as follows:
1. warmup ride to dunwoody high school via avondale estates, 22 miles
2. moderate to aggressive 1st half of dunwoody cycling group ride, including paceline sections on Columns Drive and Riverside, 17 miles
3. fairly aggressive 2nd half of dunwoody cycling group ride, including hilly bits, 18 miles
4. leisurely ride home, 22 miles. Shorter options available if a group wants to skip the decatur roundabout.
There is ample water en route, notably between 2/3 and on segment 4 (so 2 bottles is sufficient).
Meetup options are as follows:
05:58 Botanical Gardens entrance on Piedmont (heading into and through the park) or 769 Argonne
06:03 corner of park and virginia
06:08 at the corner of highland and ponce, turning left on ponce
06:10 Moreland and Ponce gas station
06:30 Avondale clock tower
07:30 dunwoody high school for Dunwoody Sat Morning Ride start
Sample route: http://app.strava.com/activities/57503376Join Club