From up here you have a wonderful view of the mountains and the lake. Attention here is the junction to the S3 Trail to Bernina (not recommended). Better to take the S2 trail down the slope. (already difficult enough)
As the previous speaker said ... under no circumstances should you take the trail to Bernina. For me it's S4. Very blocked. Mostly not mobile. Pushed and carried around a lot! Leave it if you want to have fun cycling.