Enjoy the Sunrise, ride 100K and be home before noon. On this ride you will start in the city and then ride most of the Gateway Trail to Pine Point Park. From there the 62 mile route will head back while the longer routes will continue on to Marine on St. Croix and beyond.
Sunday Sunrise Solitude with 62 miles - https://ridewithgps.com/routes/30688594
Sunrise Solitude with Wheelock Pkwy with 77 miles - https://ridewithgps.com/routes/32950443
Most riders do the 62 mile route and many times there is a second ride leader on the ride doing the 62 mile option, but there is the possibilty you will need to be self sufficent, From Pine Point the longer routes go the Osceola for the !00 route and beyond to St Croix Falls for approximately 120 + miles. They are an out and back, so mileage can be dependant on when you would want to turn around to come back.
Main ride leader will most likely do the 100 mile or more option ride, so you may need to be self sufficient if there is no leader on the 62 mile route. Ride leader has maps for anyone wanting to do the 100 mile + routes at their own pace or speed.