Is it unreasonable to specify which game you're referring to? Oh well, reproaches won't do either of us any good so.
I assume you mean Twilight Princess and the Goron who guards the trail that leads up to Death Mountain.
Climb up the wall and get knocked down at least once by the Goron. Then turn around and return to Kakariko Village. There, Renado, the village shaman, will further the plot and direct you to Mayor Bo of Ordon Village.
After reaching the village, the mayor will tell you how to win the Gorons trust and bestow upon you a certain piece of equipment, with the help of which you will be able to get past the Goron.