Please forgive the off-topic post, but I think this may be the best way to get this information to US folks attending Worlds in Boston who are also holding tickets to the 2026 Nationals in St. Louis.
It turns out only the senior events will be competed in St. Louis. The junior events are being exiled to the Centene Community Ice Center in Maryland Heights, which I was told is about 20-25 miles from the main arena.
I am not happy to have learned this critical information long after tickets went on sale and many people purchased All-Event tickets with the expectation they'd be able to see all the events without dealing with a rental car, parking fees, taxi/Uber charges or (possibly) icy highways.
I have expressed my displeasure at the USFS booth. Perhaps some others will want to do the same.