Half Distance Triathlon Boulder Training Plan - Unlock Your Best Race Day Performance at Altitude. Our 36-Week Advanced Training Blueprint is built specifically for amateur advanced triathletes targeting this challenging and fast course. Boulder isn’t just another race—it’s high altitude, fast rollers, packed dirt run trails, and a legendary endurance community. That’s why your training must be equally elite. Here’s how this plan sets you up for success on race day: ✅ Swim-Specific Training ...