https://www.xcontest.org/2018/usa/ranking-hg-open/

You can join the contest for 2019 here:
https://www.xcontest.org/usa/

Only one pilot signed up for Sport Class:
https://www.xcontest.org/usa/ranking-hg-sport/

Other countries have similar XContests
https://www.xcontest.org/national/

Thanks to Bill Belcourt