Clopper Lake Trail Race

Sun October 24, 2021 Gaithersburg, MD 20878 US Directions



Seneca Creek State Park
11950 Clopper Rd
Gaithersburg, MD US 20878


Join us for the second IN-PERSON 5K/10K Clopper Lake Trail Race at Seneca Creek State Park on Sunday, October 24, 2021!

The course follows the Lake Shore Trail around Clopper Lake.
Disclaimer: The Lake Shore Trail loop that we've marked is a bit longer than a true 5K. Based on our measurements, a more accurate distance for the 5K (10K) is about 5.2K (10.4K).
The race starts and finishes at Buck Pavilion, there is plenty of parking, but carpooling is always encouraged!

Registration Fee Schedule

$30: July 15 - July 31
$35: August 1 - September 30
$40: October 1 - October 23
$45: Race Day (October 24)

Registration fee includes processing fees, entry to the park, gender-specific tech tee, finishers medal, and post-race grub! Prices for the 5K and 10K are the SAME!

We have limited sizes and quantities left of our Tech tees, you can select your size during the checkout process. Please note that some sizes are sold out.


Race Day Timeline

8:00 am - Race Opens to Runners/Park Opens
8:00 am - Packet pickup and race day registration at Buck Pavilion
9:00 am - Race starts

We are partnering with a local charity, LOVEPAWS for our race this year! We are donating a portion of our net profits to LOVEPAWS. We are also collecting pet food race day morning to help fill their pet food pantry!


Was founded as an animal intake prevention program to help keep pets in homes and out of shelters. To do this, they offer various types of assistance to pet owners including a pet food pantry and re-homing service. We are donating a portion of our net profits to LOVEPAWS. Learn more here:


Q. Where does the race start?
A. Race HQ and the Start/Finish line are located at Buck Pavilion.
Q. Can I run with a stroller?
A. No, not unless your stroller is self-driving and equipped with all-terrain tires 😄. But seriously, the trail is not suitable for strollers.
Q. Can I run with my dog?
A. We love trail running with our dogs, however, in the interest of safety, we've decided we can't allow participants with dogs.
Q. Can I change the distance I register for?
A. Yes, but you must email us by OCTOBER 22 to make any changes. We will not accept any distance changes after October 22. We also will NOT allow changes on Race Day morning!
Q. Are you offering T-Shirts?
A. YES, but you must register by Thursday, September 30, 2021, to guarantee you receive a shirt in your preferred size. Participants registering after September 30 are not guaranteed a shirt, but may receive one on a first-come, first-serve basis on race-day, depending on available surplus.
Q. What are the cut-off times?
A. All runners must be off the course by 11:00 am.
Q. What's the course like?
A. You will run on a natural trail, with rocks, roots, some hills, and bridges (no stream crossings).
Q. Is there a finishers' medal?
Q. I'm new to trail running, is this a good race for noobs?
A. Absolutely! The loop around Clopper Lake is the perfect balance of distance, climb, and off-road terrain for new trail runners and expert trailblazers alike. We suggest starting with the 5K (1 loop) if this is your first trail race.
Get in touch if you have any questions!


Race Contact Info

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