There are actually quite a few US Zoos with snow leopard, but in terms of exhibit, they have gotten a bad deal. None of the large, extensive designs that more popular tigers have gotten. I presume this is largely due to the need to enclose the top of a snow leopard exhibit to keep them from getting out. Cincinnati, Denver and San Antonio are all horrific and need to be demolished immediately.
Colorado Springs opened a new one last year, better than what they had, but not by much. It is still way too small and totally unacceptable for a newly-built exhibit at an AZA institution. San Diego is not very good either, part of their outdated cat canyon, but it does have lots of boulders for climbing and hiding.
There are no truly spectacular exhibits in US, none like the Zurich one that looks amazing from photos, but here's a few I've seen that are not bad. (Not great, but not bad). Bronx Zoo, Los Angeles Zoo, Houston Zoo, Big Cat Rescue, Philadelphia Zoo (alternated on exhibit with amur leopard). Salt Lake City may be pretty good, but I haven't been there. Bronx Zoo's sister facility, Central Park Zoo, is opening one later this year which we all assume will be nice.