Lubbock. About 96 teams across nine gyms in four ISDs over three days at year-end. Run by Lubbock Caprock AMBUCS, with proceeds funding adaptive AmTrykes for people with disabilities. Every team gets at least four games, no entry fee.
Allen, north Dallas suburb. Roughly 96 games over three days at end of December. Field skews heavy on Texas 6A programs with national invitees mixed in. The host gym (Eagle Fieldhouse) seats more than most college venues, so attendance is real.
Fort Worth / DFW Metroplex, late December. 65 editions running. Played across multiple Mansfield/Fort Worth high schools (Whataburger sponsors but is HQ'd in San Antonio — the tournament moved to DFW years ago). Operated by Championship Basketball Inc. Two divisions: Orange (top tier) and Blue.
National Prep Tournament in Fort Walton Beach, Florida takes both high school and post-grad programs. Applications stay open through October 31. If you want a competitive early-March slot without invitation-only barriers, this is the one to apply for.