Climbing Trail Ridge Road from the Estes Park side is an epic ascent to North America's highest continuous paved road, offering breathtaking Rocky Mountain scenery. Prepare for an exceptionally long 20+ mile climb gaining nearly 5000ft, reaching altitudes over 12,000ft (3700m). Experience steady, moderate gradients averaging around 4-5% as you wind through forests into the vast, open alpine tundra. The paramount challenges are the extreme altitude and highly volatile weather (severe cold, wind, and storms are possible anytime above treeline, even in summer – so be sure to pack layers). Be mindful that a Rocky Mountain National Park entrance fee is required, and that the Trail Ridge Road is closed off-season due to deep snow even in early May, typically opening around Memorial Day weekend or early June depending on snowpack. Always check the official RMNP website for exact opening dates, current road status, and any timed entry reservation requirements before planning this unforgettable high-altitude ride.