Yep, basically all them but if you don't hit the speed pad on the left after the first corner you can get 2 going down there instead. I don't think it's quicker but it's there.

On my fastest lap it was Boost/BR at the start, 1 off the top of the hill, 1 at the bottom of the same hill and 1 at the end, off the jump with my boost.

Is doing a boost/Br in the tunnel and then 2 at the end faster??