Best 24-hour gym in Tomball, TX. Offering personal training, weight lifting, cardio exercise and open gym access. Serving programs in Cypress and Magnolia. About Company Iron Summit Fitness is a 24-hour gym in Tomball, Texas, designed for both beginners and experienced lifters. With plenty of free weights and a supportive atmosphere, it’s the perfect place to build strength and confidence on your own schedule. Members enjoy a clean, well-equipped facility focused on real training, not gimmicks.