Two times this summer i have had random loss of bowel control any ideas what would cause this?

Variable Reasons: Limited information makes a precise answer difficult. Possibilities include but are not limited to; pelvis floor muscle dysfunction - particularly if the writer is a female with a prior history of pregnancies, bacterial infection is less likely but possible, a specific food intolerance such as lactose or gluten products or other dietary intolerance. See your doctor for full analysis.

Maybe diet.: Many folks with fecal continence issues can achieve significant improvement without surgery. Foods most likely to cause episodic incontinence or urgency are: milk/milk products (except yogurt), fruits/juices (except bananas), salads/leafy greens, caffeine/chocolate, artificial sweeteners. Cut back on these by half; add a psyllium fiber supplement daily. Drink water. For more help see your doctor.