Which distances should I pick?

You have four main options: a 1-mile fun run, a 5K, a 10K, and a 13.1-mile half marathon. Because this is a wave-based start (7:30 AM, 8:00 AM, and 8:30 AM), I’d suggest picking the distance that matches your fitness and getting there early to secure your preferred wave. Given the relaxed nature of the event, the 10K is likely the "sweet spot" for enjoying the scenery without feeling like you're grinding through a serious training block.

What kind of terrain am I looking at?

The course is set around Piney Creek Hollow Park, which means you’ll be running on a mix of paved park paths and some neighborhood-style roads. It isn't a technical trail race, so don't bring your mountain running shoes, but expect some gentle rolling terrain. It’s not a pancake-flat speed course, but it's certainly not a mountain climb either—perfect for a casual morning effort.

Should I expect a serious competitive field?

Not at all. There is no official chip timing for this event, which is the biggest tell that this is a social run. You'll need to rely on your own GPS watch or a running app to track your progress. If you are looking for an official time to upload to a leaderboard or a qualifying standard, this isn't the event for you.

What will the weather be like in Centennial?

Early June in Colorado can be a bit of a wildcard. You can expect pleasant morning temperatures in the 50s or 60s (Fahrenheit), but the sun can get intense quickly once it's up. Since you'll likely be in a costume, dress in layers that you can easily shed. Hydration is non-negotiable—even if it feels breezy, the high altitude and dry air will sneak up on you.

What do I get for my registration fee?

For the price point, the value is decent. Depending on the distance, you're looking at roughly $38 to $65. You get a finisher medal, a T-shirt (though note that these are shipped to US addresses only), and a finisher towel or giveaway. If you want to save a few bucks, they offer an "Eco Registration" for $32.80 that skips the shirt. Check Runsignup ↗ for the most current breakdown.