October 1 - November 30, 2021

Carkeek 12 Hour

950 North West Carkeek Park Road

12hrs, 6hrs AM start, 6hrs PM start

Registration closes: Tue, Nov 30 @ 11:59PM


The 2021 Carkeek 12-hour and 6-hour is a go! As we approached race weekend and COVID cases continued to soar, it became clear that it would be irresponsible to hold an event on such a small loop where frequent interactions make the likelihood of transmission greater. As a result, the decision was made to go virtual. All registered entrants should see an email in their inbox detailing how the virtual event will work as well as offering rollover credit to a future event.

We want to make sure you can have a safe and enjoyable loopy day, which means we'll have COVID protocols in place to help keep our runners and our respective communities safe. What that means may be determined in full as we get closer to October and have a better idea of what community transmission looks like, but you can likely expect the sort of low-key family vibe we always strive for at our events. We care about keeping communities safe. We also want you all to have fun and for the Carkeek tradition to live on, too, so we'll update this space as we get closer to the 15th annual Carkeek so you better know what to expect and how we plan to keep you and your loved ones safe.


Carkeek has a reputation as the toughest 12-hour out there. If you've run it before, you know why: Lots of gain (often in the form of stairs) and frequently lots of unpredictable fall weather, too. Mostly, though, we want to see you challenge yourself and get into the spooky spirit of Halloween.


Running for 12 hours or 6 hours can sound intimidating, but we promise everyone does it the same way: One step at a time, one loop at a time. The 1.93-mile loop (or even harder 0-54-mile short loop, for those who have truly lost it) helps you rack up the miles and get more time on your feet. We promise the smiles generally outnumber the complaints, and no, the number of stairs each loop does not actually change.

Running for six hours or twelve hours is way more fun than you think, and while it's hard, the time will probably fly faster than you think, too. Yes, Carkeek hurts, always, but it's also always a blast, and a super fun way to leap into Halloween and seasonal costumed shenanigans.


In addition to being tough, this race is also meant, in its entirety, to be FUN. And, as it has historically happened around Halloween weekend, we are, as always, encouraging you to bring out your best Halloween costumes for a lap or several. In fact, we'll have additional prizes for best costumes! (And if you want to rock a costume for the entire run? We salute you and applaud your spirit!)

We strongly support pets in costumes, too, and have been known to find special prizes for extraordinary canine cuteness.


This race, like Cottontail in the spring, is an Endless Trails fundraiser, so any and all registration fees (+ bonus donations) that aren't used for awesome prizes will go to our 501(c)3 non-profit to support trail work, trail education, and trail advocacy throughout the Northwest region. Most often we donate Carkeek funds back to Carkeek trails. You'll also have the option to make an additional donation to Endless Trails as you're registering. Every little bit helps, and all of it goes back to good and much-needed work on local and beloved Northwest trails. Thanks for your support!
Looking for more info, or awesome photos from a previous year's race? Check out all the details here:

*Prices include US sales tax, but not UltraSignup fees; US fees applied at check-out. All registrations are non-refundable and non-transferable to other runners/events. Registration fees + all donations go to Endless Trails, a 501(c)3 non-profit for trails.*

Local time: 11:22 AM


Linked Events

Ask a Question

Top Performances