Most cyclo-cross courses will have at least one point where you are forced to dismount your bike. This could be some steps, a hurdle that you’re unable to bunny hop over or a steep run up. Also, if conditions are bad or deteriorate as the race goes on, you may find it quicker and more efficient to get off and run some sections. Take time to master these key techniques and you will definitely find yourself moving up the field.
Find the other cyclo-cross videos in this series here -https://www.britishcycling.org.uk/knowledge/skills/cyclo-cross