Onion Creek is a stream located in Travis County, Texas. It flows through the scenic Onion Creek Metropolitan Park and is known for its natural beauty and recreational opportunities. The creek is a tributary of the Colorado River and provides habitats for various wildlife species. The area surrounding Onion Creek features hiking trails, picnic spots, and fishing areas, making it a popular destination for outdoor enthusiasts. The creek's waters are typically clear, and its banks are lined with lush vegetation, contributing to the region's biodiversity and ecological health.