From the USATF certified coach directory plus USATF affiliated club rosters. USATF publishes credentialed coaches with level and event focus when reported by clubs. The roster JSON sources from these official USATF datasets and merges them by city for directory builds.

Level 1 is the entry-level event coaching credential. Level 2 is the advanced event-specific credential, typically held by coaches with documented competitive coaching experience and athlete development records at sectional and national meet levels.

Yes. Hammer is a relatively rare event in US high school programs but has growing club support. Each row supports a hammer field that flags coaches who teach hammer in addition to the more common shot put and discus event focuses.

Each coach row carries a primary event specialty plus secondary events when reported. The template surfaces the dominant event for the city as a headline, with full event breakdowns in a sidebar for throwers focused on specific event development goals.

Each city still gets a page. The template emphasizes the individual coach profile when the count is low. Sparse cities still rank for local intent because the credential and event specialty signals match what serious throwers actually search for.

Venues are sourced from USATF club facility listings plus public school and college track facilities that allow throwing event practice. Each row lists the primary venues in the city, which is a practical consideration for throwers planning regular practice routines.

Yes. Each row supports a recentResults field that flags coaches with athletes at recent USATF Junior Olympics or USATF Outdoor Nationals. The template renders that as a credibility callout, signaling competitive success in addition to credential level.

USATF runs certification cycles annually. After each cycle, you merge new and re-certified coaches into the affected city rows and trigger a rebuild. Cities with newly promoted Level 2 coaches pick up credential upgrades, and unchanged cities stay served from cache.