... not gonna lose any sleep over this question, but
I'm perplexed that anyone would think it wise to explicitly grant "ownership" of the intellectual property, i.e., the map, to the race event. I don't think the race needs or wants that. Further, I don't think we have the right to do that.
Our function in this activity is to provide a properly measured and certified course. The map is merely a means of communicating how to properly setup the certified course. It is not the product (unless you make it such).
Remember the mantra: "We certify COURSES not RACES!"
The race is not in a position to support the map, follow up, update or modify. Only the measurer is. We really want the measurer to maintain his/her interest in the map. I understand that we implicitly grant the race the right to use our map to help communicate their course, but they don't "own" it.
We put the course is in the public domain, not the map. Normally, nobody, not event the race event, has license to plagiarize it for other purposes.