Briana Mazzolini-Blanchard is a community organizer, Indigenous environmental conservation advocate, educator, and rock climber. She is Native CHamoru and Indigenous to the island of Guam, a US territory, but currently resides on the ancestral homeland of the Shawandasse Tula and Myaamia peoples in Cincinnati, Ohio with her partner and son.

Mazzolini-Blanchard is the Co-Founder of the Indigenous Field Guide, a digital resource created to amplify Indigenous voices and provide public education to prevent the damage of non-renewable environmental and cultural resources, and she is also the Strategic Partnerships Manager for Access Fund, the nation's leading climber advocacy organization. She is an athlete representing Mammut North America, Gnarly Nutrition, SCARPA North America, Rhino Skin Solutions, and Asana Climbing.