Race to the Top of Mt. Umunhum Half Marathon

Saturday, March 8, 2025 • San Jose, CA

Embark on an extraordinary adventure as we present the inaugural Race to the Top of Mt. Umunhum Half Marathon. This one-of-a-kind race will take you on a journey through two breathtaking parks, Almaden Quicksilver Park and Sierra Azul Open Space Preserve.

The course unfolds like a thrilling point-to-point expedition, offering you an incredible opportunity to conquer the rugged beauty of this terrain. As you ascend, you’ll discover the untamed splendor of these parks, and the challenge of the course will be as rewarding as the views.

But don’t worry; we’ve got your return covered. After you’ve reached the pinnacle of Mt. Umunhum and taken in the awe-inspiring panoramas, we’ll provide transportation back to the Hacienda Parking Lot, which is conveniently located near the race’s starting point. This way, you can savor every moment of the descent without the logistical hassle.

We sincerely hope you’ll be part of this historic event, where you’ll test your mettle, explore pristine landscapes, and be part of a brand-new tradition. The Race to the Top of Mt. Umunhum Half Marathon promises to be an unforgettable experience, and we can’t wait to share it with you. Join us for a day of unmatched outdoor adventure and achievement.

Race Weather & Climate

Situated in Santa Clara County, San Jose, California, boasts a dynamic tech scene.

March 8th in San Jose, CA indicates the late days of winter with average high temperatures of 63-67°F and average low temperatures of 44-48°F. The weather is cool, reflecting the end of the winter season. Rainfall during this period is generally minimal, contributing to a dry and cooler late winter atmosphere in the city.