Just spent some time around Lake Geneva/Vaud, not cycling but walking/hiking. Not a huge amount to say except, if you do go via Montreaux, head into the hills a bit before you hit Lausanne. The road next to the lake is cyclable, and people do it, but it's busy, and the view of the lake/mountains across the lake will be blocked by huge houses. There are much nicer (and climbier) roads (which people also cycle) up in the vineyards with beautiful views. Maybe drop down to the beach before Lausanne (I think it opens up around Lutry) and follow what you can of beach front trails until you're the other side of Lausanne. Unless you want to check out the city (which is in the hills).
Those vineyards are called the Lavaux, and I agree, they are stunning! Much nicer than hugging the lake at that point, even though the main road does have a cycle lane for the busier / faster sections. It's worth taking the seafront road through Lausanne, past the IOC etc.
Yeah, did a 20k walk through them a couple of weeks ago. Really enjoyed myself. Tried a couple of the local tipples along the way as well. Liked the stuff from Ollon much more.
Just spent some time around Lake Geneva/Vaud, not cycling but walking/hiking. Not a huge amount to say except, if you do go via Montreaux, head into the hills a bit before you hit Lausanne. The road next to the lake is cyclable, and people do it, but it's busy, and the view of the lake/mountains across the lake will be blocked by huge houses. There are much nicer (and climbier) roads (which people also cycle) up in the vineyards with beautiful views. Maybe drop down to the beach before Lausanne (I think it opens up around Lutry) and follow what you can of beach front trails until you're the other side of Lausanne. Unless you want to check out the city (which is in the hills).