Showing 57 events within 50 km in the next 90 days. Page 1 of 3.
The world-famous Eerie Erie is a Halloween themed 5k and 10k race that runs through historic downtown Erie and takes advantage of our beautiful trail system that weaves along the Coal Creek open space areas. The 10k passes by scenic Pleasant Hill Cemetery with panoramic views and where friendly spirits can’t wait to visit this year’s runners.
The Eerie Erie is an official BOLDERBoulder Qualifier event.
Attention
You must register by October 19 at 12:00pm in order to get a shirt.
Any registrations after that date/time will not receive a shirt
A Great Cause!
Eerie Erie is the primary fundraiser for the Optimist Club of Erie, a non-profit organization whose sole mission is to benefit the children of our community by funding youth-specific events, programs, and activities throughout the year. You can learn more about the Optimist Club of Erie at www.erieoptimists.org.
Thank you to our sponsors:
Germany Law Firm | United Power
Event details and schedule
2026 Course Routes
5k Course Route (.pdf)
10k Course Route (.pdf)
** You must register by October 13 at to receive a shirt. All registrations after that day/time will not include a shirt.
On-site registration: 7:30am - 9:00am
Packet pick up: 7:30am - 9:15am
10k Start: 9:30am**
5K Start: 9:50am**
*Registration fees are $5 more for on-site, race day registration
** Start times are subject to change - please check https://erieoptimists.org/eerie-erie/ for the latest information.
Join us for the Erie Half and 5k!
The Hometown Race Series features half marathons and 5k distance events in outlying communities outside the Denver and Boulder metro areas.
LOOK UP! At the Erie event, we often see the early morning skies with dotted with delightfully colorful hot-air balloons.
Whatever distance you're ready to tackle, we'll be there with you to celebrate at the finish line! This is one of the few 5k events where FINISHER MEDALS are awarded to each participant. Go home with proof of your pride and show off that bling!
Come join us for a race around the entirety of beautiful Lake McIntosh! This 3.5 mile race is a half paved/half dirt course surrounded by wonderful mountain views, vast farmlands, and beautiful aquatic wildlife! Gather at Dawson Neighborhood park near the pirate ship playground where you will find an assortment of vendors, music, games, and fun! All are welcome to participate in this awesome event! Doggos are encouraged to participate!
! NEW ADDITION ! We are so excited to announce the Kids Dash! Please bring your kiddos to enjoy a mad dash to the finish line near the Pirate Ship Playground at Dawson Park!
What you get... Every participant will receive a high-quality race shirt, special AHR dogtag, and other goodies. Finishers will receive a unique event coin and finisher award. 100-mile finishers will receive an attractive belt buckle. We will have a fully-stocked aid station near the start/finish. For the overnight races you can custom-order hot food items that will be cooked and ready for you when you complete your next lap! Quesadillas (vegan and non-vegan), potatoes, mashed potatoes, ramen, and more! Bathrooms are also located nearby. Virtual participants will receive a shirt, certificate, and awards. Overseas shipping is extra. About the event The tragic events of 9/11/01 changed our nation forever. Let us not forget our proud history and those who fight everyday to keep us free. Please join us for this special day on this beautiful, flat, fast 1.05-mile loop course. The 100-mile race cutoff is 30 hours. No politics, just patriotism. - David Clark #WeAreSupermanAMERICAN HEROES RUN TIME
SCHEDULESeptember 11:• 100-Mile Run starts at 10:11 a.m. on Friday, and the cutoff is 4:11 p.m. on Saturday (30 hours).• 24-Hour Run starts at 4:11 p.m. on Friday, and finishes at 4:11 p.m. on Saturday.September 12:• 9 Hour & 11 Minute Run, and Marathon: Start at 7:00 a.m. and finish at 4:11 p.m.• Half-Marathon: Starts at 8:46 a.m. (The time in New York when the first Trade Center Tower was attacked.)• 9.11-Mile Run: Starts at 9:03 a.m. (The time in New York when the second Trade Center Tower was attacked.)• 5K Run/Walk: Starts at 9:37 a.m. (The time in Washington, DC when the Pentagon was attacked.)For the Six-Hour Run, you can start and finish any time within the 30-hour window from 10:11 a.m. Friday to 4:11 p.m. Saturday. Run during the day, or during the night, or some of each, whatever you like!Mike Melton, owner of MCM Timing, will be your timing professional. Your data/tracking is backed up constantly and that information has backups to backups. Mike is the #1 race timer in the
country you'll be in great hands! Event's current local time: 2:24 AM MT
Dress up and run spooky and silly at the I Ain't Scared (of 5k) in Thornton! Fun music, Halloween snacks and costumes galore!! This event only comes around once every few years when Halloween lands on a weekend. You don't want to miss it! Every racer gets a T-shirt with GLOW IN THE DARK printing and a FINISHER MEDAL!
Thanks for registering for the race! Please see Sanitas Sports website for Gold Rush omnium series event details and schedules for all five races.
Sanitassports.us
Introducing the Raising the Barr Ultra Race. Try to finish as many 10 mile loops around the lake in the first 4 or 10 hours and then switch to 1 mile loops for the last few hours of your race.
Registration includes bib, t-shirt, and post-race meal.
Founded in 2011, over 10,000 B Strong Riders have raised over $5 million to fund the B Strong Center for Integrative Care at Boulder Community Health and support other local cancer charities.
Event T-Shirt & Jersey:
[B Strong 2026 T Shirt.jpg] [b48c1cff-0f1d-4a09-b7d4-f1d920d563a8.jpg]
Join us for the annual Summer Sizzler 5k/10k/15k! A fun summer event that is perfect for the whole family.
The fun includes -
Great Swag - designer shirt & custom medal
Chip-timing with live results and awards
Free photos
Delicious Treats waiting at the finish line
FREE Shaved Ice!
Plenty of fun!
Grab your friends and family, you are not going to want to miss this one!
Can't make the race? No problem! We offer a virtual race option where you can run anywhere, at any time, and still earn the fun swag!
*Youth-based pricing for the 5k/10k, 12 & Under are only $17!
5k/10k/15K 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, and a specifically crafted medal for our kids' dash event! (If your child wants to run the kid's dash, and doesn't want the SWAG, they are welcome to run with us on race day for free!)
*Register by midnight on Thursday, two Thursdays before race day, to guarantee your shirt!
🏁🏅Create a team, or join an existing team during registration. Once 4 people have registered on that team, all team members will be refunded $5, once ten people register another $5 will be refunded for a total of $10!
You CAN 5k. This event is for EVERY ONE. EVERY BODY.
You won't get lost. You won't get forgotten. You'll run (or jog or walk or crawl) a clearly marked 5k course with friendly volunteers pointing the way! We're going to keep you motivated and safe along the way. When you're done we'll be at the finish line with a huge smile and a high five to celebrate YOU, because YOU CAN 5k!!
Leading up to your race, you'll champion others to donate to one of the local event charities. As your donations grow, so does your swag bag!
Welcome to the Pioneer Prairie Dog Half Marathon event; the one that started the series! With 10k and 5k events too!
Everyone is back to school and slipping into a routine. Make this your mental health break as you break away from the chaos of weekly schedules and give yourself a morning to race in the crisp autumn air! You'll be glad you took time for YOU!
Join the WESTY HALF and 5k this fall!
The Hometown Race Series features half marathons and 5k distance events in outlying communities outside the Denver and Boulder metro areas.
Whatever distance you're ready to tackle, we'll be there with you to celebrate at the finish line! This is one of the few 5k events where FINISHER MEDALS are awarded to each participant. Go home with proof of your pride and show off that bling!
The Night Nation Run is the World’s first Running Music Festival the ultimate blend of a Music Festival and a Fun Run. Experience a music filled course with Live DJs, Bubble Zones, Light Shows, Neon and Black Lights! Cross the finish line into an Epic Main Stage After Party featuring Top Headliner DJs!
To date, over 2 MILLION people across the World have become a member of the Night Nation™!
The Night Nation Run is proud to support Stand Up To Cancer (SU2C) as their official charity. Stand Up To Cancer (SU2C) is a groundbreaking initiative created to accelerate innovative cancer research that will get new therapies to patients quickly and save lives now.
Celebrate Life. Celebrate friends and family. Celebrate Music. Run with the Night Nation™!
REGISTRATION INCLUDES:
Night Nation T-shirt (Premium & VIP Registration)
Race Bib
Glow Necklace
Free Giveaways
Pre and Post Race Concerts
Admission into the Night Nation after party
The best night of your life!
Rocky Mountain Road Runners holds a monthly Trophy Series in the Denver area. We provide a low-key, low-cost racing environment. Everyone is welcome to run with us!
The 10km race uses a handicap start system, slow-to-fast, spread over ~30 minutes. This gives everyone a chance to win. We'll use your estimated finish time to assign you a start time with others the same speed.
All 5k racers will start ~15min after the first 10km starters.
Race Day Details
Time: 10k starts at 8:00 am + your handicap.*
5k starts approximately 15min after the first 10k starter.
Show up 30 minutes early to get your tag and warm up.
Location: Riverdale Ballfields, 9830 Riverdale Road, Thornton, Colorado, 80229
Course: Both distances are out-and-back on a mix of paved and smooth gravel.
Parking: Plenty of parking at the park.
One of Colorado's favorite trails meets one of its most glorious parks at our 9th annual Fallfest! As courses wind southwest along Big Dry Creek Trail, the remarkable sight of Standley Lake with the Flatirons on the horizon will come into view. Its Endless Series sidekick in September is Beat the Heat.
parkrun is such a simple concept: turn up every Saturday and volunteer, walk, jog or run 5k.