Ok, I haven’t quite figured out how to ride a workout on an organised group ride. I thought that the organiser made that happen. Having organised a few group rides, I know this is possible. So in theory, you just need to sign up to one of the events that suits you time wise:
If you want to join a rubber banded event- here is the list!Just click on the URL and it will take you to RGT to register for the event.
Stage 7: To Get To The Other Side workout on RGT Stelvio *
RGT Stage 7 Event 1 (Friday March 17, 3pm GMT) : https://user.rgtcycling.com/event?code=6DV2WQ
RGT Stage 7 Event 2 (Saturday March 18, 1am GMT): https://user.rgtcycling.com/event?code=PWE8TQ
RGT Stage 7 Event 3 (Saturday March 18, 11am GMT): https://user.rgtcycling.com/event?code=Z9G7M7
RGT Stage 7 Event 4 (Saturday March 18, 4pm GMT): : https://user.rgtcycling.com/event?code=TWDGHK
RGT Stage 7 Event 5 (Saturday March 18, 9pm GMT): https://user.rgtcycling.com/event?code=XB6NG6
RGT Stage 7 Event 6 (Sunday March 19, 7am GMT): https://user.rgtcycling.com/event?code=ARDYKC
Or if you want to ride it solo on the public route, I think you can just go to the workouts tab, find the TGTTOS workout, and then like right click and choose to ride it on the Stelvio map? I think that’s how it works. Someone on Facebook posted an ace description. This means you won’t be rubber banded to the other riders that start with you