Idanha, Oregon is a small town located in Marion County, within the northwestern United States. The region experiences a mild temperate climate, characterized by warm summers and cool, wet winters. Average temperatures range from the mid-30s°F (-1°C) in winter to the mid-80s°F (27°C) in summer.

Idanha is nestled near the picturesque Santiam River, which plays a crucial role in hydrology constituents. The river originates in the Cascade Range and flows through Idanha, providing a valuable water resource for both residents and wildlife. The Santiam River is known for its pristine beauty, making it a popular spot for fishing, kayaking, and boating.

Outdoor recreation opportunities abound in Idanha, with its proximity to the Willamette National Forest. The forest offers numerous hiking trails, including the popular Opal Creek Wilderness Trail, showcasing stunning waterfalls and old-growth forests. Camping, birdwatching, and wildlife viewing are also popular activities in the area.

Overall, Idanha, Oregon offers a pleasant climate, abundant water resources, and a wide range of outdoor recreational opportunities, making it an attractive destination for nature enthusiasts.