Lodge Grass is a small town located in Big Horn County, Montana. It features a semi-arid climate, characterized by hot summers and cold winters. Summers are typically warm, with average temperatures ranging from the mid-70s to the low 90s Fahrenheit. Winters, on the other hand, are cold and snowy, with temperatures dropping to the teens and 20s Fahrenheit. Precipitation is relatively low, with most of it occurring during the summer months as thunderstorms.

Hydrologically, Lodge Grass is situated near the Little Bighorn River, which flows through the town. The river provides a source of water for the community and supports various aquatic ecosystems.

Outdoor recreation opportunities in Lodge Grass are abundant. The town is surrounded by picturesque landscapes, making it an ideal destination for hiking, camping, and wildlife viewing. The nearby Big Horn Mountains offer opportunities for activities such as fishing, boating, and hunting. Additionally, the Little Bighorn Battlefield National Monument is a short drive away, providing visitors with historical and cultural insights into the area's Native American heritage and the famous Battle of Little Bighorn.