To add images to your event please go to the list of your events and click on the Photos button under the race name for which you would like to add photos.
All uploaded photos will now be visible to visitors of your event's page.
In case you would like to add a logo of your race follow the steps above to upload your logo and then click on Edit mmm yyyy Edition and then on No image selected yet button (if you haven't selected a logo before) or on the image previously used as your logo.