Aquabike
A swim followed by a bike — a triathlon without the run. Sprint and Olympic distances, often alongside a tri at the same venue.
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Plan your race
Free pace calculators for endurance sports. Work backwards from your goal time to understand the pace you need to hit to reach your finish time.
Each calculator is built for that specific sport, with the distances and units the sport races in tailored to that sport.
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Open water races take place in lakes, rivers, bays, and oceans. Distances can run anywhere from a short 500m swim to 10K marathon events. Just you and the water.
Built around sustained effort on a bike, exploring cities on the open road. Beginner distances create a great entry point into endurance sports.
Covering a distance on foot under a weighted rucksack — from timed solo challenges to longer team events.
From 5K to marathon, running races are an accessible entry point into endurance sport. There's a distance for every fitness level and a community at every start line.
Running off-road — dirt, singletrack, and mountain paths — from 5Ks to ultras. The terrain makes for an exciting twist and adventure in your running journey.
An ultramarathon is anything beyond the standard marathon — 50K, 50-mile, 100K, 100-mile, and timed events. Crossing the line is less about speed and more about not quitting.
Every sport
Multisport and water racing — swim, bike, and run in any combination, plus pure paddle and open-water events.
A swim followed by a bike — a triathlon without the run. Sprint and Olympic distances, often alongside a tri at the same venue.
Run, bike, run. The multi-sport format without the swim. Two disciplines, one race — a great bridge between running and triathlon.
Open water races take place in lakes, rivers, bays, and oceans. Distances can run anywhere from a short 500m swim to 10K marathon events. Just you and the water.
Kayak, canoe, SUP, and outrigger races on rivers, lakes, and ocean. Sprints to marathon distances, split by craft.
A continuous race alternating open-water swimming and running across a series of segments. Distances, format, and legs vary by event.
Swim, bike, run — back to back. The sprint distance makes it far more accessible than most people think. Three sports in one race means three movements to train and race day never gets monotonous.
Putting one foot in front of the other — from a first 5K on the road to singletrack trails and 100-mile mountain ultras.
From 5K to marathon, running races are an accessible entry point into endurance sport. There's a distance for every fitness level and a community at every start line.
Running off-road — dirt, singletrack, and mountain paths — from 5Ks to ultras. The terrain makes for an exciting twist and adventure in your running journey.
An ultramarathon is anything beyond the standard marathon — 50K, 50-mile, 100K, 100-mile, and timed events. Crossing the line is less about speed and more about not quitting.
Sustained effort and pacing on two wheels — smooth pavement, mixed gravel, or technical singletrack.
Off-road cycling on mixed terrain — pavement, gravel, dirt — for miles. Enjoy the outdoor adventure and welcoming community.
Mountain bike races take place on singletrack trails and natural terrain — dirt, roots, rocks, and forest roads. Mountain biking rewards skill as much as fitness.
Built around sustained effort on a bike, exploring cities on the open road. Beginner distances create a great entry point into endurance sports.
Racing that mixes disciplines or adds obstacles, navigation, or load. From a stadium fitness race to a multi-day expedition. Raw fitness meets grit and problem-solving.
Trek, mountain bike, and paddle with navigation between checkpoints — from a few hours to multi-day expeditions, usually in teams.
A fitness race combining 8km of running with 8 functional workout stations. Think gym meets race day — in a stadium, with hundreds of athletes going simultaneously.
Obstacle course races (OCR) combine running over different terrain with a series of physical obstacles — walls, rope climbs, monkey bars, carries, and crawls. The barrier to entry is lower than it looks.
Covering a distance on foot under a weighted rucksack — from timed solo challenges to longer team events.
Endurance Sports Resources
Pace calculators are just one piece of the puzzle. Here are more tools to help you keep moving forward towards a finish line.
What race day actually feels like in all 16 sports — distances, terrain, and how to start.
Endurance races across all 50 states, in one calendar. Find your next start line.
Racecation planning — lodging, travel, and things to do around your goal race.
Frequently Asked Questions (FAQs)