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Pulse Endurance Runs

March 16

The Course

I’m so excited to have Pulse Endurance Runs back for 2023!!
You were always looking for a timed race without pavement hurting your feet right? At the Pulse Endurance Runs, you can enjoy nature while running on a beautiful flat dirt trail 2 1/2 mile loop bordering the Boise River and Eagle Island pond. See the website for all course details. This is a great course to get your first ultra, anywhere from a 50K to 100 miles and beyond!

The Race

The Pulse Endurance Runs are a beautiful and flat fixed-time race held at Eagle Island State Park, 8 miles west of Boise, Idaho. Test yourself against the clock and some of the northwest’s top timed event runners at Idaho’s premier timed race on a flat, dirt trail. Set a goal and achieve it, running as many miles as you can in 48, 24, 12, or 6 hours. Or, sign up for the 100 mile fixed-distance option!
Come for fun, or come for speed….just bring your smiles!
No refunds will be provided, including in the event of a cancellation outside of the organizers control.

Race Times

We have a lot of event options. Make sure you are checking the start times and signing up for the race you intend to!


All entries are non-refundable. Online registration closes Monday March 13, 2023 at 11:59 PM.

Race Start Times are as follows:
48 Hour 6pm, Thursday 3/16 (ends 6pm 3/18)
100 Mile: 10:00 am, Friday 3/17 (32 hour cutoff, 6:00 pm, 3/18)
6 Hour Night Option: 6:00 pm, Friday 3/17 (ends midnight Friday)
24 Hour: 6:00 pm, Friday 3/17 (ends 6:00 pm, 3/18)
12 Hour Night Option: 6:00 pm, Friday 3/17 (ends 6:00 am, 3/18)
12 Hour Day Option: 6:00 am, Saturday 3/18 (ends 6:00 pm, 3/18)
6 Hour Day Option: Noon Saturday 3/18 (ends 6:00 pm Saturday 3/18)

Volunteer Requirement

Runner Volunteer Requirement
Each local runner is required to furnish one volunteer for the race to fill a minimum 4-hour shift. Please help us out with volunteers.  Volunteers are critical in keeping this race successful and continuing to make this race as awesome as it can be for all the runners.  If you know more than one person that would like to volunteer please let me know.  We will waive this requirement if you are coming from out of the state, because we want you to sign up anyway!

Once you have registered and given your volunteer info, please have your designated volunteer select their time using the Volunteer button on the main page so that we have all their information and can contact them with specifics about their volunteer spot. There is a spot on the form for volunteers to pick their own time frame. Thank you!

Packet Pickup

Packet pickup will be at The Pulse Running and Fitness Shop on Tuesday and Wednesday Mar 14th & 15th from 11-6pm. After that all packets can be picked up at Eagle Island Park under the shelter starting 1 hour prior to your race start.

Crews, Aid, Facilities

Crew & Personal Aid: Runners may have crew support every lap. There is an area directly adjacent to the course with space for tents or canopies for personal aid stations. Your crew is only allowed to crew you in the designated area at the Start/Finish area.
Parking: Enough parking directly adjacent to the course with easy access from the course to your car any time.
Park Entry Fee: The park entry fee for one car is included in your race entry fee. Any other family members or spectators in additional cars will need to pay the State Park fee of $5.
Food and Aid: The official race aid station will be available every 2.5 miles as you finish each lap. We will have a wide range of typical ultra food, and we are open to your suggestions and food requests.
Warming Tent: If Covid precautions allow there will be a warming/sleeping tent set up next to the Aid Station. Feel free to bring a cot, sleeping bag and blankets as you feel is needed. You may set up your own aid station in here if so desired. PLEASE LET ME KNOW IF YOU PLAN TO USE THIS TENT. NO ONE HAS NEEDED IT THE LAST FEW YEARS AND IT’S VERY EXPENSIVE TO RENT SO I WON’T BE RENTING IT IF NO ONE NEEDS IT.
For those running at night make sure to bring extra clothes, it can get pretty cold and windy so extra layers may be needed. Also don’t forget to bring extra batteries for your headlamp. Even though we are inside a state park there isn’t any lighting on the backside of the course so you will need to use your headlamp.


The nice thing about a timed event is that there are no DNFs (unless you sign up for 100 miles and don’t complete 100 miles)
Overall winners (top 3) for each race will be awarded


Pacers (which is anyone who is a non racer who is on the course with you), will be allowed when you are 1/2 through your race. For example, if you are a running the 48HR you can have a pacer at 24 hours in, if you’re running the 12HR, you can have a pacer at 6 hours in.  I encourage you to have a pacer to help make your race more enjoyable, but please follow the Pacer rules so the race is fair for everyone.  You do not want your pacer to cause a DNF for you.


March 16
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