Thank you for your question. You definitely want to follow your own surgeon's post-op activity instructions. This is a general guide I give to my patients: 1) No heavy lifting or strenuous activity for 6 weeks. 2) Resume walking at a leisurely pace right after surgery (e.g. 2 mph) 3) At 2 weeks, you can walk 2 miles at 2mph 4) At 3 weeks, you can walk 3 miles at 3mph 5) At 4 weeks, you can walk 4 miles at 4mph 6) At 5 weeks, you can jog 5 miles at 5mph 7) At 6 weeks, you can resume all activities, but listen to your body and use discomfort or tightness as a guide so you don't over do it.If you feel good 2.5 months after your surgery and are pretty active, you should be ok for the mud run. I would build up to it and listen to your body and also check with your plastic surgeon prior to the run.