Dr. Russ Reinbolt, an ultramarathon runner and ER doctor, shares insights on wilderness medicine and endurance challenges. He discusses the innovative use of intranasal fentanyl for pain management in ski patrol rescues. The conversation then dives into his experiences with shark encounters, highlighting the importance of emergency preparedness for divers. Reinbolt also opens up about training in extreme heat and strategies for balancing hydration and electrolytes during intense races, making for a thrilling blend of medical expertise and adventurous tales.