2024 – Oregon Grotto
2025 – San Joaquin Valley Grotto
2026 – Southern California Grotto
2027 – Shasta Area Grotto & Shascade Caving Society
2028 – San Diego Grotto
2029 – Willamette Grotto
2030 – Northern Nevada Grotto
2031 – Desert Dogs Troglodyte
2032 – Diablo Grotto
2033 – Cascade Grotto
