The first half is flat with a nice view on the Lac du Bourget. The climb starts after 7 km, initially with a gentle slope, but getting steeper in the last 3 km's, until the Col du Chat at 633 m altitude. Note that the col du Chat is not the same as the Mont Chat which is a much longer and steeper climb starting at Le Bourget-du-Lac (just south of the Col du Chat). Enjoy!!
See my other videos and playlists at https://dashboard.kinomap.com/en/users/129864/playlists