Oregon’s Regions & Landscapes

Reading a landscape here starts with process. Mountain building, past eruptions, faulting, and persistent weather set the template. Elevation, aspect, and the reach of wind and moisture sort temperature and water, which then sort plants and wildlife. Human land use layers roads, irrigation, and fuels work onto that pattern, altering how water travels and how fire behaves.

This topic collects short explainers that treat place as cause, not backdrop. Each one shows how form drives function, from microclimate to habitat. If you are weighing a season to visit or trying to understand why conditions change from one ridge to the next, these entries help you read the ground with a field-first lens.

• How the Landscape Around Sisters Explains Its Own Climate and Ecology: A concise explainer on how the land around Sisters shapes local climate and the ecology that follows from it.

Use this guide to connect the terrain you see to the weather and habitats you’ll encounter next.

Published: September 29, 2026 · Reviewed by the State Of Oregon editorial team