This article describes a grammar game that is an enjoyable way for students to correct sentences. In Climbing Grammar Mountain, best suited for secondary and university students, learners compete in teams to "climb" a game board. They earn needed equipment in the form of sentences. If a student can correctly state whether a sentence is grammatical, s/he is able to proceed, with bonus points for correcting an incorrect sentence. The game board, sample sentences, and instructions for teachers and students are included along with suggestions for adaptations.