We will meet up north of the danube right next to the bike rentral "Fahrradverleih Copa Beach" and cycle along the river until we arrive at the U6 station Neue Donau. There we will get over the bridge all the way to the south side of the danube and drive straight ahead along the river to the turningpoint at Kraftwerk Greifenstein. Afterwards we again cross a bridge to get on the north side again back to the meeting point.
Course: https://www.bergfex.at/mybergfex/activity/3261d04c88ed7166cb0eb4e19870810a/
The course is about 45 km long and with a short break halfway through it shouldn't take more than 2 1/2 hours. This time not for total beginners. Don't forget to bring a helmet and something to drink.