The largest living species of tree is the giant sequoia (Sequoiadendron giganteum). These enormous trees are native to the western Sierra Nevada mountains in California and can grow to be over 300 feet tall and more than 3,000 years old. Their immense size and longevity make them a remarkable symbol of natural beauty and strength. The giant sequoia is characterized by its massive trunk, thick bark, and towering height. Conservation efforts are crucial to protect these majestic giants from threats such as climate change and habitat loss, ensuring their survival for future generations.