⏵ Course guide · South Jersey timed ultra
Loopy Looper runs a 3.75 mile paved loop around Cooper River Park in Pennsauken, New Jersey, and lets you pick your battle: a 12-Hour or 24-Hour where you rack up laps against the clock, or the fixed 27-lap, 101.25 Miler. I will walk you through the loop and the format choices first, then give you a pacing and fueling plan built for a race you run around and around. There are free calculators along the way to dial in your own numbers.
These facts come from the official Endless Endurance event page. Entry fees are tiered and rise as the date approaches, so check the current pricing there before you register.
Every format at Loopy Looper runs the same 3.75 mile paved loop around Cooper River Park, mostly flat, with the same start/finish hub. What changes is the clock and the target.
These two formats are the simplest version of the race: run as many 3.75 mile laps as you can before your window closes. The 12-Hour will not let you start a new lap after 6:30 PM, and the 24-Hour cuts off new laps at 6:30 AM, so your last lap has to be underway before those times even if it finishes later.
This format has one job: complete 27 full laps, 101.25 miles, and that is a hard requirement for finisher status. There is a hard 30 hour cutoff for the whole distance, and a checkpoint along the way, 21 laps (78.77 miles) completed by 7:00 AM, or you do not get to keep going. Treat that checkpoint as your real pacing target, not just the final cutoff.
4-person relay teams can take on the 12-Hour or 24-Hour, with only one teammate on the course at a time and the option to run the final lap together as a group finish. Aid comes from one food and hydration station at start/finish plus a hydration-only station at the loop midpoint, which closes at 7:00 PM. This is a cupless race, so bring your own bottles or a bladder for every pass through aid.
A flat, paved loop rewards a steady, repeatable pace far more than it rewards an aggressive early split, especially once your format stretches past a few hours.
Pick a per-lap pace early that you could realistically repeat on tired legs at hour 10 or hour 20, then hold it. On a flat paved loop the temptation is to bank early laps fast, but that tends to cost you more in the second half than it earns in the first. Use a race-time prediction to see what a given lap pace does to you across your full 12, 24, or 30 hour window before you commit to it.
Since 21 laps by 7:00 AM is a hard gate before you can chase the full 27, build your pacing plan around hitting that checkpoint with a real margin, not a photo finish. A recent long race or long training block gives you an honest read on what pace holds up over that many hours.
⏵ Free tools to plan your effort
Passing the start/finish and a midpoint aid station every 3.75 miles gives you a real logistical advantage over a point-to-point race, and your fueling plan should use it.
Set a per-hour carbohydrate target and treat each lap as a checkpoint to top off, since aid is never more than half a loop away. Aim for roughly 60 to 90 grams of carbohydrate per hour once you are moving for several hours, and use the midpoint station's 7:00 PM close as a planning marker if you are running the 24-Hour or 101.25 Miler overnight.
This is a cupless race, so pack bottles or a bladder you can refill quickly at either aid station. Early August in South Jersey commonly runs warm and humid through the daytime hours, so build in sodium and fluid replacement accordingly and plan your gear for a genuine temperature swing if you are out through the night.
⏵ Build your fueling plan
Get a carb, sodium, fluid, and caffeine plan per hour built for your weight, your chosen format, and an early August New Jersey day with the free ultra fueling calculator. Browse the rest of the free running tools at the tools hub.
⏵ Train for it with Summit Line
Get a training plan built around YOUR fitness and the kind of sustained, repeatable time-on-feet a looped timed ultra demands. Summit Line reads your real training, builds the durability your chosen format asks for, and rehearses your fueling so race day is something you execute, not guess at.
It is a timed, looped ultramarathon at Cooper River Park in Pennsauken, New Jersey, run by Endless Endurance on a 3.75 mile paved path around the park. You pick your format going in: a straight 12-Hour or 24-Hour where you rack up as many laps as you can, or the 101.25 Miler, a fixed 27-lap finish that carries its own hard cutoff. There is also a fun evening Glow-Up Loop with no placement awards.
You need to complete 27 full laps of the 3.75 mile loop, 101.25 miles total, and that is a hard requirement for finisher status, not just a target. There is a hard 30 hour cutoff for the whole distance, with an intermediate checkpoint: you must complete 21 laps (78.77 miles) by 7:00 AM to be allowed to continue toward the finish.
The course itself is not the challenge. It is a mostly flat, paved loop around a park, about as forgiving as ultra terrain gets. What makes it hard is the format: repeating the same 3.75 mile loop for 12, 24, or 30 hours tests your patience and pacing discipline more than your climbing legs. The 101.25 Miler in particular demands real overnight management since it can run through a full night on course.
They differ by format. The 12-Hour will not let you start a new lap after 6:30 PM. The 24-Hour will not let you start a new lap after 6:30 AM. The 101.25 Miler runs on a hard 30 hour cutoff for the full 27 laps, with a checkpoint requiring 21 laps (78.77 miles) completed by 7:00 AM to keep going. Build your own pacing plan around whichever cutoff applies to your format.
Yes, for the 12-Hour and 24-Hour formats, 4-person relay teams are an option. Only one team runner is allowed on the course at a time, and teams are permitted to run their final lap together as a celebration finish. The 101.25 Miler is listed as an individual format.
Bring your own bottles or a hydration bladder. The aid stations, one food and hydration station at start/finish and a hydration-only station at the loop midpoint, do not provide disposable cups, so you refill from your own gear. The midpoint station closes at 7:00 PM, which matters if you are still out overnight in the 24-Hour or 101.25 Miler.
The 12-Hour format is a genuinely approachable entry point: a flat, paved, well-aided loop close to home in South Jersey, with a fixed 6:30 PM cutoff for new laps that keeps the day contained. Because you pass the start/finish area every 3.75 miles, gear and support logistics are simple compared to a point-to-point trail race, which makes it a forgiving place to try pacing a timed event for the first time.
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<a href="https://runsummitline.com/guides/loopy-looper">The Loopy Looper course guide</a><iframe src="https://runsummitline.com/embed/race/loopy-looper" style="width:100%;max-width:420px;height:180px;border:0;" loading="lazy" title="Loopy Looper course guide by Summit Line"></iframe>This guide is independent and for planning only. The format, date, and course details come from public sources and can change year to year, so confirm the current specifics with the official race before you register or run. The fueling and pacing advice is general and not medical advice.
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