Hornbrook, California is a small community located in Siskiyou County, in the northern part of the state. This unincorporated area has a population of around 250 people. Hornbrook experiences a Mediterranean climate, characterized by warm, dry summers and cool, wet winters. Summers can reach temperatures in the 90s°F (32°C), while winters see temperatures in the 30s to 40s°F (0-4°C). The area is known for its beautiful natural landscapes, with the Klamath Mountains to the west and the Cascade Range to the east.

Hornbrook is situated near the Klamath River, a significant hydrological feature in the region. The river provides opportunities for fishing, boating, and other water-based activities. The area is also surrounded by numerous creeks and streams, adding to the hydrological diversity. Outdoor enthusiasts can explore the nearby Klamath National Forest, which offers opportunities for hiking, camping, and wildlife viewing. The forest is home to various species, including deer, black bears, and bald eagles.

Overall, Hornbrook, California offers a pleasant small-town atmosphere with access to natural beauty and outdoor recreation opportunities.