Riley, Oregon is a small unincorporated community located in Harney County in the southeastern part of the state. Situated in the high desert region, Riley experiences a semi-arid climate with hot, dry summers and cold, snowy winters. Summers are characterized by temperatures often exceeding 90°F (32°C), while winter temperatures can drop below freezing, with occasional snowfall.

Hydrologically, Riley is located on the eastern slope of the Cascade Mountain Range and is part of the Malheur River Watershed. The Malheur River flows nearby, providing water sources for the community and supporting local agriculture.

Despite its small size, Riley offers various outdoor recreation opportunities. The surrounding natural landscape is ideal for activities such as hiking, camping, and birdwatching. Nearby Malheur National Wildlife Refuge is a popular destination for wildlife enthusiasts, boasting diverse bird species and wildlife habitats. Additionally, the nearby Steens Mountain offers opportunities for hiking, backpacking, and wildlife viewing, including the chance to observe herds of wild horses.

In conclusion, Riley, Oregon, offers a semi-arid climate, relies on the Malheur River for its hydrology, and provides outdoor enthusiasts with opportunities for hiking, camping, and wildlife observation in its surrounding natural areas.