National Championships aren't a series — they're held as individual race days under the USA Cycling umbrella to award national champions of each discipline, in every category. Gravel is a newer category, only added in 2023, whereas XCO and XCM have been around for decades.
USA Cycling requires athletes to purchase a license for all disciplines. Age-category structure spans Elite, U23, Junior, and Masters/Age-Groups.
Full Stars & Stripes jersey history by discipline and year is best pulled as a straightforward reference table directly from usacycling.org's results archives once ORI's database covers these events end to end. What follows is a recent-years snapshot, confirmed where sourcing was solid rather than backfilled with guesses — Gravel didn't exist as a discipline before 2023, and full XCO/XCM archives back through the early 2000s are a separate research pass.