Entry level? That depends which door you are using. MDSL / Northern junior league is Entry level, where the riders pay their own way. The NDL is the third level of professional speedway, there to develop riders further in theory.
I would say that it has already watered itself by the look of the river across the track. Air bags are great at becoming water holders days before a meeting but then dump their contents as soon as blown up, flowing across the track causing soft spots.