Isn’t this scary?
Well, that’s not easy. That depends on a lot of factors. Obviously the Crux springs to mind with it being the out and out lightest gravel bike. However, one must not neglect the descending. Depending on how rough and relevant that is to your racing, you might look at something more capable (suspension, more upright geo, longer wheelbase etc). The Crux is probably the fastest on a STEEP alpine ascent, bike like the Factor, BMC Kaius or Scott Addict Gravel are likely equally fast when the average speed is still above 20kph.