Event details subject to change. Please confirm all information via event website.
SSPR TRYathlon
Swim, bike, run for fun! This is the perfect starting point to try a tri. These races are about completion, not competition. All athletic levels are welcome. The only prerequisite is that you must be able to swim unassisted in deep water. Age divisions are flexible. Please choose your race based on your age or your desired race distance. […]
Boulder Sunrise 5K/10K
The Boulder Sunrise 10k & 5k Run has a reputation of being one of the most scenic courses around. BBSC will provide runners with a supported course, including plenty of aid stations fully stocked and staffed with volunteers. Once you reach the finish line enjoy the post-race party with music, beer, food, and awards! This […]
July 4th ROCK-IT RUN
Join Run to Change Lives at the Douglas County Event Center in Castle Rock for the 2nd Annual ROCK-IT RUN 5K, Half Marathon and 1K Little Rock-It RUN (8 years and under). It’s time to start a new tradition on July 4th and feel good about Changing Lives. Save 15% with coupon code CORUNNER.
July 4th Fun Run
Run, skip, hop, gallop, lolly gag or moon walk on July 4th with your friends and family to support Palmer Lake Elementary School at the Annual July 4th Fun Run. This event kicks off the 4th of July festivities in the Tri Lakes Area and supports the children of PLES. The gorgeous and fast 4-mile […]
The Niwot Mile
Start off your July 4th with s point to point downhill mile starting at Niwot High School and finishing at Niwot market - the Niwot Downhill Mile! This year is the 250th anniversary of our Independence so come out and celebrate with your Colorado peeps! Enjoy the pancake breakfast and parade afterwords. Good times with […]
Let Freedom Run
Dress up as your favorite American Hero! This could be your mom, dad, Albert Einstein, Batman, Superman, or the Powerpuff girls! This event is all about celebrating GREAT people who do and have done GREAT things! Come be GREAT with us!
Firekracker 5K
Kick off your Fourth of July with the FireKracker 5k in City Park, Fort Collins! Whether you walk, jog, run, or race, this community favorite welcomes all ages and abilities for a fun and festive morning on one of the biggest celebration days of the year. The event includes a community 5k, Elite 5k, Kids […]
Freedom Run 5K
Join Mount Evans Home Health and Hospice for the 40th annual Freedom Run 5K in Evergreen on July 4th! The scenic 5-kilometer (3.1 miles) course follows gently rolling terrain through residential areas, beginning at 8 am Evergreen Middle School and ending with a festive finish line at Nick’s Pro Fitness.
The Rundola
The Telluride Foundation is hosting the annual Fourth of July foot race, the Rundola. The Rundola is an open registration uphill foot race. Runners start at the base of the gondola on the town of Telluride side and finish at the top of the ridge. Runners and hikers will climb up the Telluride Trail (4,600 […]
Independence Day 10K
Don't miss this favorite event of the 4th of July celebration! This scenic 10K trail running race offers up some of the best views in the Breckenridge! This race is limited to 500 people and usually sells out in June. Registered racers receive a sweet race tee!
Four on the Fourth 4K
July 4th is celebrated in a number of different ways, with parades, barbecues, sparklers and fireworks, BUT there has been no better way since 2008, to get your July 4th morning off to a great start, than doing Boulder’s traditional 4K on the Fourth, which is run on a flat and fast course, followed by […]
Loveland Liberty 5K
The LL5K, hosted by Sweetheart City Racing is scheduled to begin at Loveland Fairgrounds Park on July 4th at 8:00 am. We welcome runners and walkers, and all abilities! We are proud to support two local Veteran groups, Health4Heroes and American Legion Post 2000 (local veteran’s assistance fund) with the 2023 Liberty 5K. Please check […]
Ourayce Fun Run 10K
This year marks the 40th Annual Ourayce Fun Run. This event is hosted by the Home Trust of Ouray County, a nonprofit organization whose mission is to provide permanently affordable housing and housing-related resources to modest income households in Ouray County. Our vision is to create an inclusive, economically diverse community through stewardship of community […]
Boogie’s Buddy Race
This long-standing holiday tradition is one of the most widely anticipated activities of the Fourth of July week, and you don't want to miss out on all the fun. Whether you're a seasoned runner or a casual walker, we've got a race for you! With a 5-mile, 5k, and a family fun run, everyone can […]
Independence Day Freedom 5K
Beautiful course capturing some of the best of BV. Course includes approximately 2 miles on paved roads. The middle mile is on a dirt path that follows along the Arkansas River. This is a family friendly trail suitable for walkers and strollers as well.
Firecracker 5K
Celebrate the Fourth in good old Leadville, North America’s highest incorporated city! Bring the family and friends and beat the heat above 10,000 feet. Walk or run the 5 kilometer (3.1 mile) course that starts and finishes in downtown Leadville. Run the race, watch the parade, and win a prize in the post race raffle.
Red Feather Lakes Fun Run
Enjoy a scenic fun run in and around Red Feather Lakes, Colorado including a route through Fox Acres Golf Course! Start at and finish at The Tavern at Red Feather Lakes for an expo in the parking lot, food, beers and food in the Tavern and great company! The big Red Feather Lakes 4th of […]
Burro Buster 5K
The Burro Buster 5k is a fun, family friendly, 5k in one of America's highest incorporated towns. Join us in Fairplay on the 4th of July on our run through town! The course lies inside of the town limits and starts and finishes in front of the historic Hand Hotel & Emporium. Your terrain will […]
Silverheels Trail Runs
**BIG CHANGES TO SILVERHEELS** HPRS continues to work in earnest on a newly revamped Silverheels Trail Runs experience. Traditionally the Silverheels 100-Mile was held in concert with The Last Call Fifties, and on the same weekend. We made the decision to move on from the “Last Call” name except for it’s attribution to the 50-Mile. […]
Hardrock 100 Endurance Run
About The Run The Hardrock Hundred Mile Endurance Run is an ultramarathon of 100.5 miles in length, plus 33,050 feet of climb and 33,050 feet of descent for a total elevation change of 66,100 feet, at an average elevation of over 11,000 feet. The run is held on a loop course on 4WD roads, dirt […]
Frisco Duathlon
Are you looking for a fun, single track trail challenge this summer? Register for the Frisco Duathlon taking place on Friday, July 10, 2026. The Duathlon will feature trail running and mountain biking on the Frisco Peninsula trails and is open to all ability levels.
All-Out Dog Days
Get ready for some fun in the sun and a great mid-season test of your training as we bring our 11th Annual Dog Days 5K, 10K & Half Marathon! Centrally located between Denver & Boulder along with its Endless Series sidekick in December Fa La La, the beauty of our breathtaking Flatirons as a backdrop will inspire you […]
LG Triathlon
Can you keep a secret? Eagle, Colorado, is a special place, and they have a fantastic triathlon that you should not miss. They're calling for triathlon experts, newbies, and everyone in between, including the kids! Join them on July 9th for the 14th Annual LG Tri, a sprint triathlon held in the beautiful Vail Valley town of Eagle.
Heatwave Half Marathon
5K/10K/Half- Marathon & Relay registration includes a custom bib, designer shirt, and a custom finisher medal! 1 Mile registration is untimed and includes a custom bib, designer shirt, and a custom finisher medal! The kid's dash is a fun, untimed dash for our kiddos ages 10 and under. Registration includes a mini bib, youth-sized shirt, […]
Pagosa Duathlon
The venue of the San Juan National Forest could not be more perfect for the Pagosa Duathlon as athletes trek through aspen groves, grassy fields, and the dreaded rocky Piedra Stock driveway. Join Rise Above Violence on July 10th in Pagosa Springs for this annual event.
Cookie Chase 5K
The Cookie Chase is Denver’s race that ends with cookies. Runners and walkers can take advantage of a flat and fast course, and then enjoy fresh cookies at the finish. Our mission is to bring people together to have a fun, fit morning, all while supporting the many different needs throughout our region. All finishers […]
CMRA Elk Meadow Trail Run
Come up to scenic Elk Meadow Open Space for an exhilarating 5.1 mile trail run. This is a timed event that starts and ends near the Lewis Ridge Trail Head.
Heatwave Half Marathon
5K/10K/Half- Marathon & Relay registration includes a custom bib, designer shirt, and a custom finisher medal! 1 Mile registration is untimed and includes a custom bib, designer shirt, and a custom finisher medal! The kid's dash is a fun, untimed dash for our kiddos ages 10 and under. Registration includes a mini bib, youth-sized shirt, […]
Boulder Peak Triathlon
The Boulder Peak Triathlon, Duathlon & Aquabike on July 10th is one of the countries longest and most well-known triathlons. For the veteran or first time racer, this is THE can’t miss event of the summer triathlon season, and the crown jewel of the Colorado Triathlon Series. Racers are tackling the infamous “Olde Stage” Hill, […]
High Lonesome 100
The High Lonesome 100 is a high flying endurance race in the Sawatch range of the Colorado Rocky Mountains. With 22,500' of vertical gain and reaching an elevation of 13,150', it's a hell of a course. The race runs in a loop through some of the most beautiful single track in the state, and takes runners on the Continental Divide and Colorado Trail, through 2 ghost towns, over 5 alpine passes, through remote basins, and over soaring ridges. This year's event takes place on July 30th.
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