When did anyone on Lake Austin last see the bottom of their own boat slip? For most shoreline owners it was January and February 2017. That was the only drawdown between Mansfield Dam and Tom Miller Dam since 2011, after eight of them between 2001 and 2011. The next one was set for this fall. The City of Austin planned to lower the lake about 10 feet from Oct. 12 through Nov. 30, 2026, and on Sept. 24 it canceled the drawdown.
The calendar is what changed. Since 2021, Lake Austin can only be lowered in October and November, the same months the lake is booked for fall weddings, game days and race weekend. That clash is why the water is staying up through the holidays. It is also why a fish now does the job a dry lakebed used to do.
Four seasons, one window
Drawdowns used to happen in winter, and the 2017 drawdown followed that pattern. A contemporary account from DailyTrib put the start around Jan. 2 and full refill by Feb. 13. Winter Storm Uri changed that. LCRA operates Tom Miller Dam, and after 2021 it stopped planning winter drawdowns so the hydroelectric generators along the Highland Lakes stay available to the Texas grid. The City's Lake Austin page explains how the other seasons fell away too:
| Season | Status for a drawdown | Reason the City gives |
|---|---|---|
| Winter | Off the table | LCRA keeps hydro generation available for grid reliability |
| Spring | Off the table | Fish spawn in shallow water, and spring storms bring safety and erosion risks while the lakebed is exposed |
| Summer | Off the table | Same hydroelectric reliability concern as winter |
| October–November | The available window | What's left once the other three seasons are ruled out |
That window is short. In the August 20 memo to City Council, the full cycle took about seven weeks. The lake would drop no more than about a foot a day for roughly three weeks, sit about 10 feet low for around four weeks, then refill from Lake Travis at up to about two feet a day starting Nov. 24. The same memo says that under LCRA's recent practice, drawdowns will be considered no more than once every four years under normal operating conditions.
The only window is also the lake's busiest weeks
The City's cancellation notice names the conflict directly. During stakeholder meetings, staff heard concerns about the fall wedding season and major events, including University of Texas football games and Formula 1. In early September, John Wolters, captain for Austin Riverboats, told KVUE that the company had already canceled six weddings booked during the drawdown, and that the dates overlapped the Formula 1 weekend.
"January and February, that's one thing. But for us to not use this in October and November, that is a solid six figures."
The shoreline owners in that same KVUE report weren't against a drawdown. They wanted the old timing back. "We're not opposed to a drawdown; I think it's a good idea," Jonathan Coon, a member of the City's Lake Austin Stakeholder Group, said in early September. "We think it should be in January, in February, like it always was."
So the lake's businesses and its homeowners ended up asking for the same thing, which was a winter drawdown, and that was the one option LCRA had ruled out. The stakeholder group's meeting summaries show what happened next. On Sept. 18 the group weighed three options: the original Oct. 12 to Nov. 30 dates, a Dec. 1 to Jan. 15 schedule, or canceling and continuing the discussion. On Sept. 22 the City confirmed again that LCRA would not offer January or February. The final preferences split about evenly between the December option and cancellation. Nobody chose the original schedule. The City had said it would cancel without consensus, and two days later it did.
Stakeholders had raised the timing problem back in the spring. At the first meeting on May 6, members asked for a decision by June so there would be time for permits and outreach before an October-November drawdown. At a later meeting, some pointed out that 2027 might be a better year for one, since it won't be an El Niño year and less rain is expected. That is still open. LCRA's lake lowerings page says it won't lower any pass-through lakes in 2026, and it will decide on any 2027 lowering in late summer 2027 based on conditions then.
With the lakebed staying wet, the carp do the work
Dock repair was the main reason for a drawdown, but it wasn't the only one. The August memo also listed possible temporary management of nuisance aquatic vegetation, including hydrilla, a non-native plant the City says spread rapidly in 2025. Without a drawdown, the City's options get narrow. Herbicides aren't allowed in Lake Austin. It's a narrow reservoir that supplies two of Austin's major drinking water treatment plants, and chemicals can drift downstream into intakes. Mechanical removal brings local relief around a single dock, but it can't work lake-wide because hydrilla grows fast and regrows from small pieces. And hydrilla roots survive drawdowns anyway, so a lowered lake might only buy a short break.
That leaves sterile grass carp. The City's stocking record since mid-2025 shows each release larger than the last.
- July 2025: 358 fish
- November 2025: 1,995 fish
- May 2026: 2,790 fish
- October 2026: 7,091 fish
The latest batch went in on Oct. 29, released near Jessica Hollis Park, Walsh Boat Ramp and Bull Creek, the areas with the most hydrilla. That one release is bigger than the previous three combined. The City chose the number with a new predictive model built on 15 years of Lake Austin data, which showed that anything under about 7,000 fish wouldn't bring hydrilla back to an acceptable range.
There's a reason the City is moving carefully. During the 2010–2013 drought, stocking couldn't keep up with hydrilla. Once the drought broke, the fish were still there, and starting around 2014 they ate nearly every plant in the lake. The City says it took about 10 years for the lake to recover to target vegetation levels. Even after this fall's stocking, the carp population will be about a third of the 2013 peak. The target is 10 to 30 percent vegetation coverage, and the model shows a wide range of possible timelines for getting there.
For now, the early signs are steady. In its mid-September survey, Texas Parks and Wildlife estimated 575 acres of hydrilla in Lake Austin. Vegetation usually increases between June and September, but this year TPWD found no lake-wide increase in hydrilla since February. The City's Oct. 22 memo credits the earlier stockings and easing drought for that plateau. Eurasian watermilfoil spread modestly about five miles below Mansfield Dam, though it doesn't appear to be causing navigation problems. KXAN reported the plateau on Oct. 24.
What a full lake means for November and December
The same events that pushed the drawdown off the fall calendar now get a lake at normal level through the holidays. Here are the dates set so far:
- Mozart's Festival of Lights runs Nov. 21, 2026, through Jan. 3, 2027, at Mozart's Coffee Roasters, 3825 Lake Austin Blvd. Synchronized shows start at 6 p.m. and run nightly until 9 or 10 p.m., and Mozart's posts a calendar with each night's showtimes. General admission is $7 during the early-bird period through Nov. 20 and $8 from Nov. 21. Children under 18 months get in free.
- Lake Austin Lights runs 45-minute holiday cruises from Hula Hut, with the season listed as Nov. 21 through Jan. 3 on the event's site; its boat partner lists a Nov. 20 start, so check the booking calendar for opening night. The display on the water includes two floating light tunnels and 20 lit boats. Shared-boat fares are $34.95 for ages 14 and up, $19.95 for ages 4 to 13, and free for ages 3 and under. Operating nights vary, and the latest departure is planned for 11 p.m. Mozart's also advertises its own 45-minute holiday cruise on a donut boat.
- Emma Long Metropolitan Park stays open 7 a.m. to 10 p.m., but its water utilities have been off since Oct. 12 for scheduled maintenance and are expected to come back around Jan. 15, 2027. Until then the park has portable toilets only. Showers, sinks, fountains and the dump station are unavailable, and construction noise is possible from 8 a.m. to 6 p.m. The Parks closures page still showed Oct. 12 to Nov. 30 boat ramp and swimming closures tied to the drawdown, last updated Aug. 20, so it's worth checking with Parks before hauling a boat out on a weekend. Friday-through-Sunday and holiday day passes can be bought online ahead of time, and the park caps parking at 250 cars.
Dock projects planned for this fall now have no dry window
Shoreline owners who lined up contractors for a dry lakebed this fall are the ones most affected. According to KVUE, the City is no longer accepting the special permit exemptions it created for the drawdown. Some already-permitted projects may still go ahead, and officials will contact applicants about their options. Regular dock rules are on the City's boat dock permitting page. For hydrilla around a single dock, the City says to hire a contractor who holds a Texas Parks and Wildlife Department permit for that work. This is general information, not legal advice. Any dock or shoreline project should be confirmed with the City and a qualified contractor before work starts.
The City says it will keep weighing future drawdowns with LCRA and the stakeholder group, and it accepts questions for the group by email through Austin Watershed Protection. The next real date to watch is late summer 2027, when LCRA decides whether any Highland Lake gets lowered.
If you're wondering how a missed dry window affects a dock, a bulkhead or the waterfront home you plan to sell in the next few years, Austin Lakeside Properties follows these lake decisions closely and can walk you through what they mean for your shoreline. Let's Connect.
