The CSILO 5K & 21K is a vibrant annual road race held in Loíza, Puerto Rico, and organized by the Concilio de Salud Integral de Loíza to promote community health and wellness. The event features two race distances—a 5-kilometre fun run/walk designed for participants of all ages and fitness levels, and a more challenging 21-kilometre half-marathon for seasoned runners seeking a competitive experience. Known for its festive atmosphere, the race includes live entertainment, enthusiastic crowd support, and commemorative finisher medals. Participants enjoy scenic coastal routes through the culturally rich town of Loíza, making it a unique and inspiring experience. The CSILO 5K & 21K continues to grow each year, drawing runners from across the island and beyond to celebrate fitness, community, and Puerto Rican pride.
Races
The CSILO Half Marathon (21K) is an annual 21‑kilometre road race organized by the Concilio de Salud Integral de Loíza in Loíza, Puerto Rico, offering a competitive yet community-driven coastal route with early morning start times and finisher medals. Over 2,000 runners—including elite local and international athletes—regularly participate, drawn by the event’s reputation for strong organization, scenic flat terrain, and vibrant race-day atmosphere.
The CSILO 5K is a lively community-focused road race organized annually by the Concilio de Salud Integral de Loíza in Loíza, Puerto Rico. This 5-kilometre run (or walk) course is designed for participants of all fitness levels—from families and casual joggers to more dedicated runners—featuring festive support, finisher medals, and a scenic coastal route through town.
Weather based on historical averages.
FAQs
What is the CSILO Half Marathon?
How long is the CSILO Half Marathon?
Where does the CSILO Half Marathon take place?
What is the elevation gain of the CSILO Half Marathon?
How can I prepare for the CSILO Half Marathon?
How do I choose the right training plan for the CSILO Half Marathon?
The CSILO Half Marathon (21K) is an annual 21‑kilometre road race organized by the Concilio de Salud Integral de Loíza in Loíza, Puerto Rico, offering a competitive yet community-driven coastal route with early morning start times and finisher medals. Over 2,000 runners—including elite local and international athletes—regularly participate, drawn by the event’s reputation for strong organization, scenic flat terrain, and vibrant race-day atmosphere.
The CSILO Half Marathon is 21km long.
The CSILO Half Marathon takes place in Loíza, Puerto Rico.
Runna classifies the CSILO Half Marathon elevation profile as Flat.
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 CSILO Half Marathon?
The CSILO Half Marathon (21K) is an annual 21‑kilometre road race organized by the Concilio de Salud Integral de Loíza in Loíza, Puerto Rico, offering a competitive yet community-driven coastal route with early morning start times and finisher medals. Over 2,000 runners—including elite local and international athletes—regularly participate, drawn by the event’s reputation for strong organization, scenic flat terrain, and vibrant race-day atmosphere.
How long is the CSILO Half Marathon?
The CSILO Half Marathon is 21km long.
Where does the CSILO Half Marathon take place?
The CSILO Half Marathon takes place in Loíza, Puerto Rico.
What is the elevation gain of the CSILO Half Marathon?
Runna classifies the CSILO Half Marathon elevation profile as Flat.
How can I prepare for the CSILO 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 CSILO 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 CSILO 5K?
How long is the CSILO 5K?
Where does the CSILO 5K take place?
What is the elevation gain of the CSILO 5K?
How can I prepare for the CSILO 5K?
How do I choose the right training plan for the CSILO 5K?
The CSILO 5K is a lively community-focused road race organized annually by the Concilio de Salud Integral de Loíza in Loíza, Puerto Rico. This 5-kilometre run (or walk) course is designed for participants of all fitness levels—from families and casual joggers to more dedicated runners—featuring festive support, finisher medals, and a scenic coastal route through town.
The CSILO 5K is 5km long.
The CSILO 5K takes place in Loíza, Puerto Rico.
Runna classifies the CSILO 5K elevation profile as Flat.
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 CSILO 5K?
The CSILO 5K is a lively community-focused road race organized annually by the Concilio de Salud Integral de Loíza in Loíza, Puerto Rico. This 5-kilometre run (or walk) course is designed for participants of all fitness levels—from families and casual joggers to more dedicated runners—featuring festive support, finisher medals, and a scenic coastal route through town.
How long is the CSILO 5K?
The CSILO 5K is 5km long.
Where does the CSILO 5K take place?
The CSILO 5K takes place in Loíza, Puerto Rico.
What is the elevation gain of the CSILO 5K?
Runna classifies the CSILO 5K elevation profile as Flat.
How can I prepare for the CSILO 5K?
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 CSILO 5K?
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:
Coastal
This event listing is for informational purposes only. Runna is not affiliated with, endorsed by, or sponsored by CSILO 5K & 21K or Concilio de Salud Integral de Loíza. 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 CSILO 5K & 21K website.
