As of December 2024, I’ve sold 2,410 copies of my “Best Flatiron Scrambles” guidebook, and it’s not uncommon to see 10 or more people scrambling Freeway (Class 4) on the Second Flatiron at the same time. Estimating the mortality risk of scrambling in the Flatirons requires two key data points: The estimated number of scrambles per year Using Strava data, I estimated between 21,000 and 52,000 scrambles annually.