KMC's X11.93 is our go-to chain for 11 speed cyclocross, adventure, and gravel bikes thanks to a durable design and easy install/remove with a master link.
This chain comes with 116 links, long enough for any cyclocross, gravel, touring etc. bike (except tandems) and is an attractive shiny silver color. The X-bridge outer plate is stretch resistant and half-nickel plating stands up to bike washing.
Cyclocross can really do a number on your bike's drivetrain, in particular the chain. If you race in wet / muddy conditions, it's a good idea to have 2 chains - one on the bike, and one being cleaned. Post-race, swap the two - the master link used with and included with KMC chains makes this very easy.