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Trips, Treks & Adventures San Marcos Itineraries

Don't Tread on my Tri!

The Meadows Center Glass Bottom Boat Tours

A wonderful triathlon set in one of the most beautiful spots in San Marcos. Be one of a few that can say they've swamp in Spring Lake. Take in the views on the run and bike ride in the Hill Country.

Race info:
Click HERE to register

The Triathlon is a 500 meter Swim, 12 mile Bike, and 5k Run.

The Duathlon is part of the Championship series this year and is 5k run 12 mile Bike and 5k run.

The Swim/Ride is a 500 meter Swim, 12 mile Bike.

The Swim/Run is a 500 meter Swim and 5k Run.

The last 2 event choices take care of those that don’t want to run or don’t want to bike: 5k run or 10k run.



You are swimming in a springs area, you can see the bottom, but don’t touch. NO WALKING ON THE BOTTOM OR SIDES OF THE AREA. You must swim straight down the middle and get out where others are waiting to help you get out. Once out do not go back in the water, remember it is protected.



The bike course is a very nice 12 mile out and back course that has rolling hills. It is a good, short ride.



The 5k run starts at the transition area and goes along the main road and into a hilly, shady neighborhood, you leave that neighborhood and run on hard gravel packed trail for about 1/2 mile until you hit the street and go to the finish.


10k runners will just do this course twice, you will loop around the transition area and go again. Everyone is envious of the 10k runners because you get to do a special run twice.



Please note the start times are as follows:

All starts with a swim – 7:30am

Duathlon – 7:31am

10k – 8:01am

5k – 8:20am


Pricing per person:

Several events to choose from.

1. Sprint Tri: (500m swim at Aquarena Springs, 12 mi bike, 5k run) $90


2. Sprint Tri Relay (2- or 3- person team): (500m swim at Aquarena Springs, 12 mi bike, 5k run) $45 each


3. Duathlon option 1: (5k run, 12 mi bike, 5k run) $75


4. Duathlon option 2: (500m swim/12 mi bike) $75


5. Duathlon option 3: (500m swim/5k run) $75


6. 5k Run: $40


7. 10k Run: $45


Transition open 6am-7:20am

Swim: HERE
Bike: HERE



Register online

The Meadows Center

201 San Marcos Springs Dr, San Marcos, TX 78666

Open Google Maps to The Meadows Center


Very Important Information:

Athletes must bring their photo ID and USAT membership card to packet pick up.  If you don’t have an annual membership then you must purchase a $15.00 day pass when you sign up online or at packet pick up. If the sign up was not available online you will pay at packet pick up, bring the exact amount in cash.



All finishers will get a Finishers Medal.


We will be providing awards for 1st to 4th place in most cases. These will be gender specific and in 5 year increments.


Refund Policy

No Refunds!


Thanks for signing up for our race, sometimes things change and you have to transfer your race entry or change the race, we understand. Please understand that this takes time to make these changes and we charge $20 to make that change or transfer.

It doesn’t mean we don’t love you.


Contact Bart for additional information.

What's Near Here?

The Meadows Center Glass Bottom Boat Tours

The Meadows Center Glass Bottom Boat Tours, formerly Aquarena Center, offers interpretive and self-guided tours, historic glass bottom boat rides, wetlands boardwalk, Texas River exhibits, nature-friendly Gift Shop and much more.

Splash into Science- Spring Lake Snorkel Education Program

Splash into Science is an immersive snorkeling program that provides low-impact educational fun in Spring Lake. Spring Lake is home to spring-fed waters that remain a constant 72 degrees year-round. **Click HERE to schedule your tour**

Explore Spring Lake SUP & Kayak Training and Interpretive Tours

The Meadows Center and REI Outdoor School have teamed up to offer new water-focused activities at Spring Lake. All activities are education focused and led by interpreters who are committed to protecting and sharing Spring Lake. **Click HERE to schedule your tour**