The South Texas International Marathon (STIM) is a flat, fast, and friendly event that invites runners of all levels to experience the charm and beauty of the Rio Grande Valley. Whether you're aiming for a personal best, seeking to qualify for Boston, or simply craving a scenic run through small-town Texas, this marathon offers an ideal setting. Held across the mid-valley cities, this race combines rural charm with the excitement of a professionally organized marathon, making it a must-run event for marathoners everywhere.

Why You’ll Love the South Texas International Marathon

• Flat and Fast Course Perfect for PRs: The STIM boasts a pancake-flat course with minimal elevation changes, making it a dream race for those chasing personal records or Boston qualifying times. Long, straight stretches of road allow you to settle into a steady rhythm, and the course’s design ensures you can focus on speed and strategy. Many runners have achieved their PRs here—could you be next?

• A Race with a Small-Town Heart: There’s something uniquely charming about running through small Texas towns, where the rural beauty and local support create a warm and inviting atmosphere. The route takes you through the heart of the Rio Grande Valley, offering glimpses of quaint neighborhoods and scenic landscapes that you might miss in a larger race.

• Perfect Weather for Running: Held in the cooler months, the marathon typically enjoys ideal running conditions. Cloudy skies and temperatures in the low 60s make for a comfortable and refreshing race day experience, keeping you focused and energized as you tick off the miles.

• Organized for Success: For a newer event, the STIM is impressively well-organized. The start line at Donna City Park is streamlined and efficient, allowing participants to focus on their race. Aid stations are strategically placed, and while there’s room for more volunteers, the dedicated team behind the race ensures runners are supported and cheered on every step of the way.

• More Than a Marathon: The STIM offers something for everyone, from the full marathon to exciting relay options for teams of five or two. It’s an excellent way to involve family, friends, or colleagues and share the joy of race day together. The finish-line festivities, complete with barbecue and beers, provide the perfect reward for a hard-earned finish.

From the start line in Donna, Texas, to the post-race celebrations filled with food, drink, and joy, this marathon is about celebrating the spirit of running. Don’t miss your chance to be part of this incredible event. Register now, lace up your running shoes, and prepare to make unforgettable memories at the South Texas International Marathon!