What is the Congress Avenue Bridge known for?

The Congress Avenue Bridge is famous for hosting the world's largest urban bat colony, which is estimated to consist of 1.5 million Mexican free-tailed bats. It serves as a maternity colony where female bats raise about 750,000 pups each year.

When is the best time to see the bats?

The bats emerge nightly around sunset, typically between 7:30 p.m. and 9:45 p.m., to forage for insects. This seasonal spectacle is best viewed from around mid-March to early November, though there is a lull from late May to mid-July while pups are born and learn to fly.

Where are the best spots to watch the bats?

There are three main viewing spots: on top of the bridge, below the south side, and below the north side. The Bat Viewing Area under the south side of the bridge is a local favorite, and the Austin American-Statesman's Bat Observation Area is open year-round.

Is there parking available near the bridge?

Yes, paid parking is available at the southeast end of the bridge near the Bat Observation Center. You can also find hourly paid parking at the Hyatt Regency Hotel (less than 100 yards from the south end) or at City Hall (about four blocks northwest of the bridge).

What should I check before going?

Use Gyde for context, then check official sources for current hours, tickets, construction, and closures.

Congress Avenue Bridge in Austin

Congress Avenue Bridge

Spanning Lady Bird Lake in downtown Austin, this concrete arch bridge is famous for hosting the world's largest urban bat colony. Every evening from spring to fall, up to 1.5 million bats emerge in a spectacular sunset display.

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What to know

The Ann W. Richards Congress Avenue Bridge is a concrete arch bridge spanning Lady Bird Lake in the heart of downtown Austin, Texas. Renamed on November 16, 2006, in honor of Texas Governor Ann W. Richards, the structure features three southbound and three northbound lanes for vehicles, as well as pedestrian sidewalks on both sides. Before the completion of the Longhorn Dam in 1960, the bridge crossed the Colorado River; today, it spans the impounded reservoir known as Lady Bird Lake. While the bridge is a vital transportation link, it is globally renowned as the home of the world's largest urban bat colony. This phenomenon began in the early 1980s, shortly after a 1980 renovation of the bridge. The reconstruction unintentionally left deep, narrow crevices beneath the deck, creating an ideal, cave-like habitat. Migrating Mexican free-tailed bats quickly discovered these tight spaces and began roosting there in massive numbers. Today, the colony is estimated to reach up to 1.5 million bats during the warm summer months. This is a maternity colony, where female bats raise an estimated 750,000 pups each year. The bats are seasonal residents, typically present from mid-March through early November. Visitors should note a natural lull in flights from late May to mid-July, which is when the newborn pups are born and learning to fly. The nightly emergence of the bats has transformed the bridge into an international tourist attraction, bringing roughly 140,000 visitors and up to $10 million in economic impact to Austin annually. At dusk, the bats stream out from under the bridge to forage for insects over the city and surrounding farmlands. This nightly show usually occurs between 7:30 p.m. and 9:45 p.m., and it can take up to 45 minutes for the entire colony to exit. The city even celebrates its unofficial mascots with Bat Fest, the year's biggest bat-viewing party, held right on the bridge.

Visitor tips

Watch the emergence from three main spots: on top of the bridge, below the north side, or below the south side, which is a local favorite.
Plan your visit between mid-March and early November, keeping in mind there is a flight lull from late May to mid-July.
Expect the nightly emergence to begin around sunset, typically occurring between 7:30 p.m. and 9:45 p.m.
Paid parking is available nearby at the southeast end of the bridge, the Hyatt Regency Hotel, or City Hall four blocks away.

Nearby context

The Congress Avenue Bridge sits at the southern edge of downtown Austin, serving as a gateway between the bustling city center and the scenic Lady Bird Lake waterfront. Just a short walk to the northeast, you will find the Austin Convention Center, making the bridge an easy evening escape for conference-goers and business travelers. The surrounding area is highly walkable, allowing visitors to transition seamlessly from exploring downtown's urban core to enjoying the natural spectacle of the lake's shoreline.

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