WELCOME TO THE REVOLUTION. Here at Outside, our mantra is higher, faster, farther, tougher. In case you haven't noticed, the thrill of total commitment has also gripped the women in our world. Where once a few plucky pioneers fought an uphill battle for equal access to adventure, this month's pantheon of heroines represents a generation that embraces wild places and epic endeavors as its birthright. In the pages that follow, we celebrate the athletes, explorers, innovators, and troublemakers who are living bigger, braver lives and daring us to follow their lead. These 25 women know something you should know: It's a wide-open world. Grab it. It's yours.