You have the ability to create custom competitions for your venue with the Events Modue.
Head to your events module and select the 'create new' blue button to create a competition.
The below window will appear, where you need to select 'competition'.
Complete the following fields with all your event information.
Once you are happy with the information, select 'save event'.
Here you can see a table showing all the event information.
Details: Where you can edit the event information
Activities: Promote your activities online, complete the fields for the activity requirements within the competition.
Attendees: Here you can see who is booking onto your competition
Email Reminders: You can send email reminders to your registered attendees 24 hours before.
Once you are happy, you can publish this event 'live' to your website by selecting the blue 'publish to website' button.