Imnaha, Oregon is a small unincorporated community located in Wallowa County, in the northeastern part of the state. The climate in Imnaha is characterized as semi-arid, with hot, dry summers and cold winters. Precipitation is relatively low throughout the year, with most rainfall occurring in the winter months. The area experiences high temperatures during the summer, often reaching over 90°F (32°C), while winter temperatures can drop below freezing.

The hydrology in Imnaha is influenced by the Snake River, which flows nearby and provides important water resources to the surrounding area. The river supports various fish species, including Chinook and steelhead salmon.

Imnaha offers several outdoor recreation opportunities due to its stunning natural surroundings. The nearby Hells Canyon National Recreation Area provides opportunities for hiking, camping, fishing, boating, and wildlife viewing. The area is also popular for hunting, with a variety of game species available. Imnaha is surrounded by breathtaking landscapes, including mountains, canyons, and rivers, making it an ideal destination for outdoor enthusiasts seeking adventure and tranquility.