Where is the best place in Oregon to find Indian artifacts?

The best place in Oregon to find Indian artifacts is along the Columbia River Gorge, particularly in areas like The Dalles and the surrounding region. This area was historically significant for Native American tribes, and many artifacts can be found along riverbanks and in archaeological sites. However, it's important to note that collecting artifacts from public lands is illegal without permission, so it's best to explore these sites responsibly and respectfully.