This year's competition venue is the Hoover Arena in Strongsville, Ohio (near Cleveland). Press release:
Singles skaters qualified for the U.S. Junior Championships by finishing in the top four at one of nine regional championships held throughout the country in October,
Not quite accurate -- four is the minimum number of Intermediate/Juvenile level singles skaters advancing from each regional (unless there were fewer than 4 registered for an event), but the number can be higher and is based on a percentage rule that went into effect several years ago.

Complete roster of all 8 disciplines, including skaters' scores from Regionals or Sectionals:

Icenetwork will have live and on-demand video next week.