Tmc Earth Day 5k At Biosphere 2

Celebrate Earth Day in style at the TMC Earth Day 5K on Saturday, April 18, 2026, held at the breathtaking Biosphere 2 in Oracle, Arizona. This scenic 3.1-mile run and walk welcomes participants of all levels to explore the stunning desert landscapes at the base of the Catalina Mountains. Enjoy a rewarding experience with live music, local food trucks, and fun activities for the whole family, including a free Kids Dash and Kid’s Zone. All registrants receive complimentary entry to an exclusive tour of Biosphere 2’s unique ecosystems, from wetlands to rainforests. Supporting the Ocean Reef Research Project, this inaugural event offers a meaningful way to engage with nature, promote ocean conservation, and enjoy an unforgettable Earth Day celebration in a world-renowned setting.