At the top of the Grand Taillet you don't need to continue on the Trechauffe, it's 5km up and a dead end. You can just continue down into the valley, but you'll miss a real treat. The road goes up with some standard alpine hairpins but then views of Lake Geneva opens up the landscape that was slightly restricted on the Taillet. With 1km to go there is an awesome viewing area of the lake and the mountains. The actual col sign is then a 1km down a steep road. The road ends at the col sign on a lovely ridge with more views both sides. An out and back section that was the highlight of the day's ride.