NBC will be streaming the 2018 UCI Cyclocross World Championships in the United States this weekend on its Olympic channel. See below.
I think I have all the times correct but you can double check and make calculations here: https://goo.gl/q9bfyk

Source Endurance Training Center of the Rockies is also hosting some classes and brunch during the races. Hit their event page for details: https://www.facebook.com/events/744456479093606/

Cyclocross Magazine also has some tips on watching it: https://goo.gl/W9W74c

If you have NBC's Olympic Channel 673 you can watch it there too. Thanks to Jake Keener for that little tidbit. 

I'll try to embed the races here too. 

 

Channel

NBC Olympic Channel: http://www.nbcsports.com/olympic-sports-schedule/2018-02-03

If you don't have a subscription to NBC: https://www.vrt.be/vrtnu/livestream/

Schedule 

All times MTN

Women

Saturday, February 03, 2018 07:00 Live - Women Elite
Saturday, February 03, 2018 3:00 Delayed - Women Elite
Sunday, February 04, 2018 11:00 Delayed - Women Elite

Men

Sunday, February 04, 2018 07:00 Live - Men Elite
Sunday, February 04, 2018 2:30 Delayed - Men Elite
Sunday, February 04, 2018 10:30 Delayed - Men Elite

Other Races

All times MTN

These races aren't being streamed in the US but you might be able to get them to work via Cycling Fans etc...

http://www.cyclingfans.com/uci-cyclocross-world-championships/live

Saturday, February 3
Junior Men at 3:00am
U23 Women at 5:00am

Sunday, February 4
U23 Men at 3:00am U.S. Eastern