⏵ Course guide · Big Island half marathon
Volcano's 'Ohi'a Lehua Half Marathon and 5K send runners up and back down Wright Road through native 'ohi'a lehua forest near Kilauea, with views out toward Mauna Kea and Mauna Loa along the way. I will walk you through the out-and-back format first, then give you a pacing and fueling plan for a cool Volcano Village morning, plus free calculators to dial in your own numbers.
These facts come from the official race website. Check the current year details, cutoffs, and aid stations before you commit. Race logistics change year to year.
Both races start and finish in Volcano Village. The half marathon is a straightforward out-and-back up Wright Road, while the 5K covers a separate rolling-hills route.
The half marathon climbs Wright Road through native 'ohi'a lehua forest, gaining about 500 feet before turning around at the top. Views open up toward Mauna Kea and Mauna Loa along the way, and once you turn around, gravity does a good amount of the remaining work back to the finish in Volcano Village.
Rather than the half marathon’s single out-and-back climb, the 5K covers rolling hills near Volcano Village, a shorter and punchier profile better suited to runners who want the forest setting without the sustained climb.
The course has two aid stations stocked with water and Gatorade. Because the half marathon is an out-and-back, runners pass aid four times over the full distance, while 5K runners pass it once. That repeated access is useful for staging your own fueling rhythm rather than carrying everything you need from the start.
The 4-hour half marathon cutoff, with the finish line closing at 11 AM sharp, works out to just over 18 minutes per mile average, generous for most runners but worth planning around if you expect to walk.
Set a grade-adjusted pace target for the climb up Wright Road rather than trying to hold flat pace uphill, and expect the return trip to run faster than the outbound leg since it is mostly downhill. That asymmetry means your split at the turnaround is not a reliable predictor of your finish time, so do not panic if the first half feels slower than goal pace.
Because the finish line has a hard close time rather than just a chip-time cutoff, a race-time estimate built from your training tells you honestly whether you have real margin, or whether you need to treat the early climb as effort you cannot afford to overspend.
⏵ Free tools to pace this course
Race-day temperatures at this elevation typically range from the mid 50s at the 7 AM start up to the mid 70s later in the morning, with July's usual moderate rainfall meaning a sprinkle is genuinely possible.
For most runners finishing in under 3 hours, roughly 30 to 60 grams of carbohydrate per hour, timed around the two aid stations, is enough. Use the four aid passes on the half marathon out-and-back to keep intake steady rather than front-loading before the climb.
Sodium in the 300 to 500 mg per liter range covers most runners at this distance and elevation, and the cooler start means you can lean toward the lower end early, adjusting up if the morning warms faster than expected or a rain shower adds humidity.
⏵ Build your fueling plan
Get a carb, sodium, fluid, and caffeine plan per hour built for your weight, your goal time, and a cool Big Island morning 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, this course's Wright Road climb, and the 4-hour cutoff. Summit Line reads your real training, builds a plan for a single sustained climb, and rehearses your fueling so race day is something you execute, not guess at.
It is an out-and-back climb up Wright Road through native 'ohi'a lehua forest, gaining about 500 feet before you turn around at the top and run it back down. That is a modest total for a half marathon on paper, but it comes with a real 4-hour cutoff and a finish line that closes at 11 AM sharp, so the climb itself is manageable while the clock is the part worth respecting.
The half marathon carries a 4-hour cutoff, and the finish line officially closes at 11 AM given the 7 AM start. That works out to just over 18 minutes per mile average, generous for most trained runners but worth knowing if you plan to walk significant sections of the climb.
With two aid stations stocked with water and Gatorade, half marathoners pass aid four times on the out-and-back while 5K runners pass it once. For a race this length, a light carbohydrate strategy, roughly 30 to 60 grams per hour if you are out longer than 60 to 90 minutes, plus steady hydration, covers most runners. Build your numbers with the free ultra fueling calculator if you want a more precise plan.
The course climbs Wright Road through native 'ohi'a lehua forest with views out toward Mauna Kea and Mauna Loa, turning around at the top for the half marathon and running rolling hills for the 5K. Volcano Village sits at higher elevation than most of the Big Island, so expect temperatures from the mid 50s at the start up to the mid 70s later in the morning, with July's typically moderate rainfall meaning a sprinkle is a real possibility.
Only half marathon finishers receive a finisher medal, while all runners in both distances receive a finisher shirt while supplies last. You can change from one distance to the other at packet pickup, though downgrading from the half to the 5K does not come with a refund and upgrading requires paying the difference.
Packet pickup happens at The Volcano School of Arts & Sciences on Old Volcano Highway in Volcano, with a Friday window from 3 to 6 PM (Thursday hours vary by year). Online registration closes the Wednesday before the race at midnight, and while late registration is available at packet pickup, there is no race-day registration, so plan to arrive with time to spare.
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<a href="https://runsummitline.com/guides/volcanos-ohia-lehua-half-marathon">The Volcano's 'Ohi'a Lehua Half Marathon course guide</a><iframe src="https://runsummitline.com/embed/race/volcanos-ohia-lehua-half-marathon" style="width:100%;max-width:420px;height:180px;border:0;" loading="lazy" title="Volcano's 'Ohi'a Lehua Half Marathon course guide by Summit Line"></iframe>This guide is independent and for planning only. The course details, dates, cutoffs, and aid stations 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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