Giant redwood, Lady Bird Johnson Grove, Redwood National Park. The coastal redwood, or simply 'redwood', is the tallest tree on Earth, reaching a height of 379' and living 3500 years or more. It is native to coastal California and the southwestern corner of Oregon within the United States, but most concentrated in Redwood National and State Parks in Northern California, found close to the coast where moisture and soil conditions can support its unique size and growth requirements. USA