Boulder is a city located at the foothills of the Rocky Mountains in Colorado, USA. Known for its stunning natural scenery, it offers numerous outdoor activities such as hiking, biking, and rock climbing. The city has a population of around 100,000 residents and is home to the prestigious University of Colorado Boulder. Boulder has a vibrant cultural scene, featuring various art galleries, music festivals, and local markets. The city is also recognized for its commitment to sustainability and environmental conservation, making it a popular destination for those who appreciate nature and outdoor living.