Onion Creek Boat Ramp is located at the confluence of Onion Creek and the Colorado River in Travis County and features a dedicated boat ramp with approximately 20 parking spaces and 5 boat trailer parking spaces.

The facility includes a lighted parking lot, restrooms, picnic and grill areas, and trailhead information for access to the Onion Creek Greenway trail system.

This is part of the larger Onion Creek Metropolitan Park development project designed to provide public water access in a growing area of the county.