Murderkill Ultramarathons

August 8th 2026
Felton, DE
12 Hours | 50 KM | 50 Miles

What is with the name?

I thought it would be a cool name for a race in the heat and humidity of late July. It's also because Killens Pond, where the race is held, is part of the Murderkill River. Murderkill comes from the Dutch words of "Moeder" which means "Mother", and "Kille" which is "River".

Course

A 3.10-ish mile almost all dirt loop, totally within Killen's Pond State Park. Some roots, rocks (a seashell or so), rubble - but way gentler than most trails, no rainwater and low rise (maybe 80 feet of climb per loop total). Probably a 1/10 on the technical scale. Most wear light trail shoes, few wear road running shoes. No need for super technical trail shoes on this course. The only parts that are not trail are the loop around the parking lot that is .28 of a mile and the aluminum footbridge that is probably .2 miles. 

North portion of Pondside Trail is broad and mostly dirt (sand+organics). Southside portion is single track with some roots. A footbridge is used to cross pond at dam end. All races will start at 8am (ish) at the picnie tables. Loop around the parking lot and proceed on the Connector Trail (.2 miles) by the picnic tables towards the Pondside Nature Trail then turn right onto the Pondside Nature Trail returning on the connecter trail to the turnaround at the parking lot. 

All races will use the “picnic area” There are bathrooms literally 50 yards from the picnic tables in the parking area. Porta-john MAYBE off south portion of trail near the boat ramp area (Sometimes there is one. Sometimes not).

Races are self-supported with a community table for sharing any food/drink/aid. Water will be provided. It won’t be cold. But it will be wet.

Timing will be manually. I’ll check off your loops and record your finish time.

This race is held in "Fat Ass style". No aid guaranteed (except for water). No shirts (except if you paid for one). No medals. No chip timing. You show up, run the distance, and hang out.

Upcoming Races

Aug 8 2026
12 Hours
Multiple Loop
2 Elevation Rating
Rolling, ~2500 feet in 50 miles
2 Surface Rating
Mostly groomed trail or dirt roads
Aug 8 2026
50 KM
10x5k
800 800 ft.
Multiple Loop
2 Elevation Rating
Rolling, ~2500 feet in 50 miles
2 Surface Rating
Mostly groomed trail or dirt roads
Aug 8 2026
50 Miles
16x5k
1,300 1,300 ft.
Multiple Loop
2 Elevation Rating
Rolling, ~2500 feet in 50 miles
2 Surface Rating
Mostly groomed trail or dirt roads

Results

Date Finishers Top Result (F) Top Result (M)
07/26/25 12 5:20:40 5:10:37
Date Finishers Top Result (F) Top Result (M)
07/26/25 4 10:10:00

12 Hours

Date Finishers Top Result (F) Top Result (M)
07/26/25 14 40.3 45.4

Weekly Newsletter

A roundup of the week's content and most recent race results. Sent once a week on Thursday.

Recent Results

Run The Rim
Arnold, CA - 21 finishers
50 KM
Run Comfy Numb Trail Race
Whistler, BC - 68 finishers
50 KM
Kettlefoot
Mountain City, TN - 28 finishers
50 KM
Rabid Raccoon 100
Beaver Falls, PA - 275 finishers
100 Miles | 100 KM
North Fork 50 Mile/50K
Pine, CO - 255 finishers
50 Miles | 50 KM
Cinderella Trail - Spring
Oakland, CA - 28 finishers
50 KM
The Full Mo
Sheridan, IN - 190 finishers
50 KM
Hoof It on the Hill
Cherry Creek, NY - 9 finishers
52 KM
Spence Mountain Run
Klamath Falls, OR - 11 finishers
50 KM
View All Results