⏵ Course guide · Rhode Island ultra
Ocean State Ultra is Rhode Island's newest ultramarathon, a runner-founded 100 mile, 12 hour, and 6 hour loop race at Big River Management Area in West Greenwich. I will walk you through the format and the timing structure first, then give you a pacing and fueling plan built for a long loop effort across a full night on course. There are free calculators along the way to dial in your own numbers.
These facts come from the official RunSignup event page. Check the current year details, cutoffs, and aid stations before you commit. Race logistics change year to year, especially for a young race.
Ocean State Ultra offers three ways to take on the same loop course at Big River Management Area: the full 100 Mile across up to 36 hours, a 12 Hour timed race, or a 6 Hour timed race. All three start and finish at 145-151 Division Rd in West Greenwich.
The headline distance starts at 8:00 AM Saturday and the course does not close until 8:00:59 PM Sunday, a 36 hour window. That means most finishers will spend a full night, and likely part of a second day, out on course. Plan your gear, lighting, and mental approach around a genuine overnight effort, not just a long day run.
Both timed options start an hour later, at 9:00 AM Saturday, and stay entirely within daylight and evening hours: the 6 Hour closes at 3:00:59 PM and the 12 Hour at 9:00:59 PM. Neither pushes into the deep overnight hours the 100 Mile does, which makes them a good way to experience this same loop and the race's community atmosphere on a lower-commitment scale.
Ocean State Ultra is genuinely new, built by Darlene, an ultra runner herself, into what the race describes as Rhode Island's newest ultramarathon. That grassroots origin often means a smaller, more personal field and a race director who understands exactly what runners need on course, since she has been on the other side of the starting line herself.
With a generous 36 hour cutoff on the 100 Mile and no major vertical terrain to contend with, pacing here is about sustainability across a full night, not survival against a tight clock.
The biggest pacing mistake on a 36 hour loop course is going out too fast in the cool morning hours and paying for it overnight, when fatigue and sleep pressure hit hardest. Set an even, honestly sustainable pace from the start using a realistic finish-time estimate, and build in planned walk breaks well before you actually need them.
A repeating loop course means frequent access back to your own gear, crew, or drop bag, unlike a point-to-point 100. Use a race-time prediction to sanity-check what your planned pace does to you across the full distance, then plan specific loop-by-loop goals (gear changes, fueling checkpoints, mental resets) rather than one vague overall target.
⏵ Free tools to pace this course
Late August in Rhode Island typically brings warm, humid daytime hours and cooler nights, so your fueling and hydration needs will shift noticeably as the 100 Mile stretches from Saturday afternoon into Sunday.
Aim for roughly 60 to 90 grams of carbohydrate per hour while moving. As the hours pile up overnight, lean on real food alongside gels, since gut tolerance and appetite both shift over a race this long. The loop format means you can stage exactly what you need at your drop bag or crew area rather than carrying a full race's worth of food.
Keep sodium in the 300 to 500 mg per liter range through the cooler overnight stretch, and push toward 500 to 700 mg per liter during the warm, humid late-August daytime hours. Rhode Island summer heat and humidity can sneak up on you even without mountain elevation to worry about, so treat the daytime loops with the same respect you would give any hot-weather ultra.
⏵ Build your fueling plan
Get a carb, sodium, fluid, and caffeine plan per hour built for your weight, your goal time, and a warm Rhode Island day and night 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 race-day plan built around YOUR fitness and the kind of sustained overnight time-on-feet a 100 mile loop race demands. Summit Line reads your real training, builds the durability this format asks for, and rehearses your fueling so race day is something you execute, not guess at.
The core challenge here is time on feet on a loop course, run across a full 36 hour window from Saturday morning into Sunday evening, which means at least one full night out on course for most finishers. Rhode Island does not offer the mountain terrain of a Western states 100, so the difficulty comes from the endurance and mental grind of covering 100 miles on a repeating loop, managing sleep, and staying fueled and moving through a long overnight stretch rather than fighting steep vert.
The 100 Mile starts at 8:00 AM Saturday and the course closes at 8:00:59 PM Sunday, a 36 hour window. That is a generous cutoff for the distance on a loop course, giving room for a real overnight sleep-deprived stretch without an unreasonably tight pace requirement.
Both are timed races on the same loop course as the 100 Mile, starting an hour later at 9:00 AM Saturday. The 6 Hour closes at 3:00:59 PM and the 12 Hour closes at 9:00:59 PM, so neither pushes into the overnight hours the way the 100 Mile does. They are a good way to sample this same course and race environment without committing to a full 36 hour effort.
A 100 mile effort across up to 36 hours, likely including a full night on course, calls for steady carbohydrate intake (roughly 60 to 90 grams per hour while moving) and sodium in the 300 to 700 mg per liter range, adjusted for late-August Rhode Island heat and humidity during the day and cooler temperatures overnight. Because this is a loop course, you get frequent access back to your own drop bag or crew area, so build a simple, repeatable per-loop plan rather than trying to carry everything at once. Build your numbers with the free ultra fueling calculator before race day.
Darlene, described on the official race page as the dynamic race director behind Rhode Island’s newest ultramarathon, brings her own experience as an ultra runner to the event. That runner-founded character is part of what makes Ocean State Ultra feel like a genuine grassroots addition to the Rhode Island racing calendar rather than a large commercial production.
The 36 hour cutoff and the loop format make it a reasonably approachable option if you want to attempt your first 100 without technical mountain terrain to contend with. That said, 100 miles is still 100 miles: you need real time-on-feet training, a tested fueling plan, and a strategy for the overnight hours regardless of how gentle the course itself is. If a full 100 feels premature, the 12 Hour or 6 Hour options let you experience the same course and community on a shorter, lower-commitment scale first.
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<a href="https://runsummitline.com/guides/ocean-state-ultra">The Ocean State Ultra course guide</a><iframe src="https://runsummitline.com/embed/race/ocean-state-ultra" style="width:100%;max-width:420px;height:180px;border:0;" loading="lazy" title="Ocean State Ultra course guide by Summit Line"></iframe>This guide is independent and for planning only. The course details, dates, distances, and cutoffs come from public sources and can change year to year, especially for a young race, 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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