On Thursday February 25, 2021, the National Park Service (NPS) approved our last outstanding permit  permit for the spring race! All runners will be invited to move from the waitlist to the entrants list within the next day or two (you can decline). After accepting the invitation your credit card will be charged unless you have a deferred entry from 2020. General registration will also open up to anyone who has not joined the waitlist.

The largest obstacle to having the race in April will be finding plenty of volunteers. To be able to have the event in April we will rely on support from runners to find new volunteers/aid station captains. If we cannot find enough volunteers some aid stations may need to me made minimal aid/water only or the race may need to be pushed back to the August 28-29 “rain date”. A link to sign up as a volunteer will open on Ultrasignup with official registration.

The COVID mitigation plan will not allow crew access at the normal Brunswick aid station to limit crowding on the canal. The current plan will allow crew access at Manidokan, but this is subject to change. The current plan will allow only one pacer starting at mile 69 to the finish and they must start/stop at Manidokan since there will be no crew access elsewhere on the course. The simplest way to guarantee you can see friends/family out on course may be to have them work at an aid station.

The current COVID mitigation plan can be found below and the overall COVID mitigation plan is subject to change based on local, state, and federal guidance.

1. Packet pickup of race bib will be cancelled for 2021 and they will be mailed to runners in advance of the event. Premiums will be picked up after finishing. Pre-race briefing information will be recorded in a video/email and sent to runners prior to race morning. This will eliminate crowding and congregating on race morning.

2.  Participants and race volunteers will have to print and bring a signed waiver stating that to their knowledge they have no COVID-19 symptoms AND they have taken and received a negative COVID-19 test within 72 hours of the event.

3.  Runners will start in waves of 10-50 people, socially distanced, every 2-5 minutes starting at 7:00AM on April 24th based on the latest guidance from local, state, and federal health authorities on group size limits.

4.  Runners will always be required to wear a face covering when social distancing (> 6 feet)is not possible (e.g. race start/finish, aid stations, passing another runner, passing another C&O Canal user).

5.  All race volunteers will be required to wear face coverings and those handling foods will wear disposable gloves.

6.  Runners will be required to use hand sanitizer prior to entering an aid station. Aid stations will be organized so that race volunteers will dispense all fluids/food items to runners upon request in disposable bags/cups, etc. Aid stations will be organized so that social distancing is possible. Pre-packaged food items will be prioritized for safety.

7.  Spectators will not be allowed at aid stations. Each runner will only be allowed ONE crewmember at the Manidokan (not C&O Canal) aid stations. Runners will be allowed only ONE pacer and both runner/pacers must wear a face covering or be socially distant.

8.  Runners will be discouraged from spitting, coughing, or sneezing without properly covering mouth and nose.

9.  Handwashing/hand sanitizer will be available at all toilet facilities ad face coverings will be required inside all toilet facilities.

10. There will not be the traditional post-race award ceremony. Runners will be asked to leave once they cross the finish line. Pre-prepared to-go meals will be given to runners.


The C&O Canal 100 mile race takes places on the scenic C&O Canal each year during the final weekend in April. The race starts and finishes at Camp Manidokan near Knoxville, Maryland.

The C&O Canal 100 course is almost entirely flat and offers plenty of opportunities for success both with new 100 mile runners and old veterans who are up for a challenge on a beautiful course.

The 2021 event will be held on April 24-25, 2021.


C&O 100 2020 Course Map

C&O Canal 100 Map.2020 Course Final.pdf C&O Canal 100 Map.2020 Course Final.pdf
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C&O 100 2020 Course Description

2020 Course Description.docx 2020 Course Description.docx
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The 2020 Race Details

Race swag: C&O Canal 100 Patagonia Race Singlet (included with registration).

Post-race party: A post-race meal is included with registration (11am-1pm+ Sunday) and we encourage everyone who finishes earlier to shower/rest and come back to celebrate/socialize with all of your fellow runners and cheer on the final finishers!

Buckle ceremony: Belt buckles will be awarded after the final finisher during the post-race party. Each finisher will have their name with finishing time read and then receive their buckle.

Fully electronic timing: We will be using electronic timing at all aid stations which will simplify the timing process and give you better access to your splits. Live results will be published as cell service allows.

Drop bag - A new drop bag location has been added for the 2020 race (Dargan Bend AS). 

We will still be enforcing the strict drop-bag size limits. Dargan Bend AS and Brunswick AS drop bags in will need to follow WS100 dimensions (6″x8″x16″) or be smaller. If your drop bag is larger, we won't accept it. We simply do not have enough room to transport huge drop bags or store them at the aid stations.

There are no size restrictions for drop bags placed at Manidokan AS. Victory Sportsdesign has generously offered a 10% off discount to buy their drop bags for all entrants, or you can make your own drop bag that conforms to the dimensions.



General Information

Course Overview

Course Maps

Aid Station Distances

Contact Us

Official Facebook Page

 Race News 

4/19/2021 - The pre-race briefing over zoom was recorded and can be found here. See you on race day!

4/13/2021 - The final pre-race email has been sent out. You can find the email here. The 2021 runner information packet has also been finalized and can be found here

4/9/2021 - The second pre-race email has been sent out. You can find it here. The final pre-race email with the 2021 race information packet will be sent after registration closes on April 11th.

3/26/2021 - The first pre-race email has been sent out. You can find it here.


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