Hosted by Troy's California Trail Runs, the Calero Trail Run provides participants with a variety of race options to suit different skill levels and preferences. The courses feature single-track trails, challenging hills, and dirt paths, all set within the scenic landscapes of Calero County Park. Runners can expect panoramic vistas, diverse terrain, and a supportive community atmosphere. The event is renowned for its well-organized logistics, including aid stations and enthusiastic volunteers. Registration details and further information are available on the official website.
Races
50 km
Marathon
25 km
Half Marathon
15 km
10 km
5km
Race Date:
31 May, 2025
The Calero Trail Run Ultra 50km on May 31, 2025, offers a rigorous challenge with nearly 1,898 meters of elevation gain across Calero County Park’s diverse terrain. This race is perfect for ultra-distance enthusiasts who thrive on steep climbs, technical paths, and breathtaking vistas.
Race Date:
31 May, 2025
Conquer the Calero Trail Run Marathon on May 31, 2025, a 42.2 km race that features 1,595 meters of elevation gain through scenic hills and valleys. This marathon is tailored for runners who crave the challenge of a trail race that goes beyond the usual road experience.
Race Date:
31 May, 2025
On May 31, 2025, tackle the Calero Trail Run 25km, offering 831 meters of elevation gain through the beautiful landscapes of Calero County Park. This race is a great option for those wanting a mid-distance challenge with varied terrain and stunning scenery.
Race Date:
31 May, 2025
Experience the Calero Trail Run Half Marathon on May 31, 2025, featuring a 21.1 km course with 755 meters of elevation gain in the heart of Calero County Park. This race combines moderate elevation with beautiful scenery, making it a fantastic choice for trail half marathoners.
Race Date:
31 May, 2025
The Calero Trail Run 15km on May 31, 2025, is perfect for those seeking a shorter but challenging race, with 534 meters of elevation gain in Calero County Park. It offers a mix of rolling hills and scenic trails that capture the park’s natural beauty.
Race Date:
31 May, 2025
Dive into the Calero Trail Run 10km on May 31, 2025, featuring 362 meters of elevation gain through scenic trails in Calero County Park. This race is well-suited for both new and experienced runners who enjoy the beauty of nature combined with a manageable challenge.
Race Date:
31 May, 2025
The Calero Trail Run 5km on May 31, 2025, offers a friendly and accessible race with 77 meters of elevation gain, perfect for beginners or those seeking a quick outdoor adventure. The course takes runners through the scenic trails of Calero County Park, providing a delightful introduction to trail running.
Weather based on historical averages.
FAQs
What is the Calero Trail Run Ultra 50km?
How long is the Calero Trail Run Ultra 50km?
Where does the Calero Trail Run Ultra 50km take place?
What is the elevation gain of the Calero Trail Run Ultra 50km?
How can I prepare for the Calero Trail Run Ultra 50km?
How do I choose the right training plan for the Calero Trail Run Ultra 50km?
The Calero Trail Run Ultra 50km on May 31, 2025, offers a rigorous challenge with nearly 1,898 meters of elevation gain across Calero County Park’s diverse terrain. This race is perfect for ultra-distance enthusiasts who thrive on steep climbs, technical paths, and breathtaking vistas.
The Calero Trail Run Ultra 50km is 50km long.
The Calero Trail Run Ultra 50km takes place in San Jose, California, USA.
The Calero Trail Run Ultra 50km elevation gain is 1898 meters, which Runna classifies as a Hilly race.
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Calero Trail Run Ultra 50km?
The Calero Trail Run Ultra 50km on May 31, 2025, offers a rigorous challenge with nearly 1,898 meters of elevation gain across Calero County Park’s diverse terrain. This race is perfect for ultra-distance enthusiasts who thrive on steep climbs, technical paths, and breathtaking vistas.
How long is the Calero Trail Run Ultra 50km?
The Calero Trail Run Ultra 50km is 50km long.
Where does the Calero Trail Run Ultra 50km take place?
The Calero Trail Run Ultra 50km takes place in San Jose, California, USA.
What is the elevation gain of the Calero Trail Run Ultra 50km?
The Calero Trail Run Ultra 50km elevation gain is 1898 meters, which Runna classifies as a Hilly race.
How can I prepare for the Calero Trail Run Ultra 50km?
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the Calero Trail Run Ultra 50km?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Calero Trail Run Marathon?
How long is the Calero Trail Run Marathon?
Where does the Calero Trail Run Marathon take place?
What is the elevation gain of the Calero Trail Run Marathon?
How can I prepare for the Calero Trail Run Marathon?
How do I choose the right training plan for the Calero Trail Run Marathon?
Conquer the Calero Trail Run Marathon on May 31, 2025, a 42.2 km race that features 1,595 meters of elevation gain through scenic hills and valleys. This marathon is tailored for runners who crave the challenge of a trail race that goes beyond the usual road experience.
The Calero Trail Run Marathon is 42km long.
The Calero Trail Run Marathon takes place in San Jose, California, USA.
The Calero Trail Run Marathon elevation gain is 1595 meters, which Runna classifies as a Hilly race.
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Calero Trail Run Marathon?
Conquer the Calero Trail Run Marathon on May 31, 2025, a 42.2 km race that features 1,595 meters of elevation gain through scenic hills and valleys. This marathon is tailored for runners who crave the challenge of a trail race that goes beyond the usual road experience.
How long is the Calero Trail Run Marathon?
The Calero Trail Run Marathon is 42km long.
Where does the Calero Trail Run Marathon take place?
The Calero Trail Run Marathon takes place in San Jose, California, USA.
What is the elevation gain of the Calero Trail Run Marathon?
The Calero Trail Run Marathon elevation gain is 1595 meters, which Runna classifies as a Hilly race.
How can I prepare for the Calero Trail Run Marathon?
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the Calero Trail Run Marathon?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Calero Trail Run 25km?
How long is the Calero Trail Run 25km?
Where does the Calero Trail Run 25km take place?
What is the elevation gain of the Calero Trail Run 25km?
How can I prepare for the Calero Trail Run 25km?
How do I choose the right training plan for the Calero Trail Run 25km?
On May 31, 2025, tackle the Calero Trail Run 25km, offering 831 meters of elevation gain through the beautiful landscapes of Calero County Park. This race is a great option for those wanting a mid-distance challenge with varied terrain and stunning scenery.
The Calero Trail Run 25km is 25km long.
The Calero Trail Run 25km takes place in San Jose, California, USA.
The Calero Trail Run 25km elevation gain is 831 meters, which Runna classifies as a Hilly race.
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Calero Trail Run 25km?
On May 31, 2025, tackle the Calero Trail Run 25km, offering 831 meters of elevation gain through the beautiful landscapes of Calero County Park. This race is a great option for those wanting a mid-distance challenge with varied terrain and stunning scenery.
How long is the Calero Trail Run 25km?
The Calero Trail Run 25km is 25km long.
Where does the Calero Trail Run 25km take place?
The Calero Trail Run 25km takes place in San Jose, California, USA.
What is the elevation gain of the Calero Trail Run 25km?
The Calero Trail Run 25km elevation gain is 831 meters, which Runna classifies as a Hilly race.
How can I prepare for the Calero Trail Run 25km?
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the Calero Trail Run 25km?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Calero Trail Run Half Marathon?
How long is the Calero Trail Run Half Marathon?
Where does the Calero Trail Run Half Marathon take place?
What is the elevation gain of the Calero Trail Run Half Marathon?
How can I prepare for the Calero Trail Run Half Marathon?
How do I choose the right training plan for the Calero Trail Run Half Marathon?
Experience the Calero Trail Run Half Marathon on May 31, 2025, featuring a 21.1 km course with 755 meters of elevation gain in the heart of Calero County Park. This race combines moderate elevation with beautiful scenery, making it a fantastic choice for trail half marathoners.
The Calero Trail Run Half Marathon is 21km long.
The Calero Trail Run Half Marathon takes place in San Jose, California, USA.
The Calero Trail Run Half Marathon elevation gain is 755 meters, which Runna classifies as a Hilly race.
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Calero Trail Run Half Marathon?
Experience the Calero Trail Run Half Marathon on May 31, 2025, featuring a 21.1 km course with 755 meters of elevation gain in the heart of Calero County Park. This race combines moderate elevation with beautiful scenery, making it a fantastic choice for trail half marathoners.
How long is the Calero Trail Run Half Marathon?
The Calero Trail Run Half Marathon is 21km long.
Where does the Calero Trail Run Half Marathon take place?
The Calero Trail Run Half Marathon takes place in San Jose, California, USA.
What is the elevation gain of the Calero Trail Run Half Marathon?
The Calero Trail Run Half Marathon elevation gain is 755 meters, which Runna classifies as a Hilly race.
How can I prepare for the Calero Trail Run Half Marathon?
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the Calero Trail Run Half Marathon?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Calero Trail Run 15km?
How long is the Calero Trail Run 15km?
Where does the Calero Trail Run 15km take place?
What is the elevation gain of the Calero Trail Run 15km?
How can I prepare for the Calero Trail Run 15km?
How do I choose the right training plan for the Calero Trail Run 15km?
The Calero Trail Run 15km on May 31, 2025, is perfect for those seeking a shorter but challenging race, with 534 meters of elevation gain in Calero County Park. It offers a mix of rolling hills and scenic trails that capture the park’s natural beauty.
The Calero Trail Run 15km is 15km long.
The Calero Trail Run 15km takes place in San Jose, California, USA.
The Calero Trail Run 15km elevation gain is 534 meters, which Runna classifies as a Hilly race.
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Calero Trail Run 15km?
The Calero Trail Run 15km on May 31, 2025, is perfect for those seeking a shorter but challenging race, with 534 meters of elevation gain in Calero County Park. It offers a mix of rolling hills and scenic trails that capture the park’s natural beauty.
How long is the Calero Trail Run 15km?
The Calero Trail Run 15km is 15km long.
Where does the Calero Trail Run 15km take place?
The Calero Trail Run 15km takes place in San Jose, California, USA.
What is the elevation gain of the Calero Trail Run 15km?
The Calero Trail Run 15km elevation gain is 534 meters, which Runna classifies as a Hilly race.
How can I prepare for the Calero Trail Run 15km?
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the Calero Trail Run 15km?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Calero Trail Run 10km?
How long is the Calero Trail Run 10km?
Where does the Calero Trail Run 10km take place?
What is the elevation gain of the Calero Trail Run 10km?
How can I prepare for the Calero Trail Run 10km?
How do I choose the right training plan for the Calero Trail Run 10km?
Dive into the Calero Trail Run 10km on May 31, 2025, featuring 362 meters of elevation gain through scenic trails in Calero County Park. This race is well-suited for both new and experienced runners who enjoy the beauty of nature combined with a manageable challenge.
The Calero Trail Run 10km is 10km long.
The Calero Trail Run 10km takes place in San Jose, California, USA.
The Calero Trail Run 10km elevation gain is 362 meters, which Runna classifies as a Hilly race.
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Calero Trail Run 10km?
Dive into the Calero Trail Run 10km on May 31, 2025, featuring 362 meters of elevation gain through scenic trails in Calero County Park. This race is well-suited for both new and experienced runners who enjoy the beauty of nature combined with a manageable challenge.
How long is the Calero Trail Run 10km?
The Calero Trail Run 10km is 10km long.
Where does the Calero Trail Run 10km take place?
The Calero Trail Run 10km takes place in San Jose, California, USA.
What is the elevation gain of the Calero Trail Run 10km?
The Calero Trail Run 10km elevation gain is 362 meters, which Runna classifies as a Hilly race.
How can I prepare for the Calero Trail Run 10km?
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the Calero Trail Run 10km?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Calero Trail Run 5km?
How long is the Calero Trail Run 5km?
Where does the Calero Trail Run 5km take place?
What is the elevation gain of the Calero Trail Run 5km?
How can I prepare for the Calero Trail Run 5km?
How do I choose the right training plan for the Calero Trail Run 5km?
The Calero Trail Run 5km on May 31, 2025, offers a friendly and accessible race with 77 meters of elevation gain, perfect for beginners or those seeking a quick outdoor adventure. The course takes runners through the scenic trails of Calero County Park, providing a delightful introduction to trail running.
The Calero Trail Run 5km is 5km long.
The Calero Trail Run 5km takes place in San Jose, California, USA.
The Calero Trail Run 5km elevation gain is 77 meters, which Runna classifies as a Moderate race.
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Calero Trail Run 5km?
The Calero Trail Run 5km on May 31, 2025, offers a friendly and accessible race with 77 meters of elevation gain, perfect for beginners or those seeking a quick outdoor adventure. The course takes runners through the scenic trails of Calero County Park, providing a delightful introduction to trail running.
How long is the Calero Trail Run 5km?
The Calero Trail Run 5km is 5km long.
Where does the Calero Trail Run 5km take place?
The Calero Trail Run 5km takes place in San Jose, California, USA.
What is the elevation gain of the Calero Trail Run 5km?
The Calero Trail Run 5km elevation gain is 77 meters, which Runna classifies as a Moderate race.
How can I prepare for the Calero Trail Run 5km?
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the Calero Trail Run 5km?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
More
Sport:
Running
Tags:
Nature
Kid friendly
Park
This event listing is for informational purposes only. Runna is not affiliated with, endorsed by, or sponsored by Calero Trail Run or Troy’s California Trail Runs. All event details are based on publicly available information and are provided solely to help users discover running events. Runna does not use any official logos, images, or proprietary content from this event or its organiser. Any trademarks or names mentioned are used descriptively to identify the event in a factual manner. For the most accurate and up to date information (including to register or purchase an entry to the event), please visit the Calero Trail Run website.
