Summit Line

⏵ Course guide · Texas ultra

Habanero Hundred Course Guide

The Habanero Hundred is billed as the hottest trail race in Texas, and it earns it. You run a flat, sandy 10K loop at 7IL Ranch near Cat Spring, the gun goes off at high noon in the August heat, and the finish rate at the hundred is famously low. There is barely any climbing here. The heat is the course. I will walk you through how the day unfolds, then give you a pacing and fueling plan built around the sun and the loop, with free calculators along the way to dial in your own numbers.

⏵ At a glance

Habanero Hundred quick facts

Date
Main events Sat Aug 22, 2026 (135M starts Fri Aug 21); typically mid-to-late August
Location
7IL Ranch, Cat Spring, TX (just outside Bellville, west of Houston)
Distances
135M, 100M, 100K, 50K, marathon, half, 10K, plus 100M and 100K relays
Course
A 10K loop (the Yellow Trail) of loose sand, grass, and gravel road, almost no shade, about 280 ft of gain per loop
Start
High noon Saturday for the 100M / 100K / 50K; 12:30 PM for the marathon / half / 10K; 6:00 PM Friday for the 135M
Cutoff
30 hours overall (noon Saturday to 6:00 PM Sunday), with a 4:00 PM Sunday loop cutoff (no starting another lap after)
Qualifier
No Western States, Hardrock, or UTMB qualifier status listed by the race

These facts come from the official race site and the ultra calendars. Check the current date, exact start times, cutoffs, and aid setup in the race-day details before you commit. Race logistics change year to year.

The course: where the Habanero is won and lost

Every distance runs the same 10K loop, the Yellow Trail, around 7IL Ranch: loose sand, grass, and gravel ranch road with almost no shade and only about 280 feet of gain a lap. The 100 mile is sixteen of those loops, the 100K is ten, and the 50K is five. It is not a technical or a climbing course. It is a heat course, and the loop is where you live or die.

The first afternoon: survive the noon heat

The race sends you out at high noon, on purpose, into the worst heat of the day. That is the crux of the whole event, and it comes at the start, not the end. The real-feel temperature is regularly above 100 with thick humidity, and the loop is open sand with no shade to hide in. The classic mistake is feeling fresh and clicking off fast early laps, because the heat does not punish you right away, it punishes you two hours later. Go out slower than feels right, walk more than your ego wants, and treat the first several loops as damage control rather than racing.

Because it is a 10K loop, you pass the start/finish aid every single lap. Use it. This is your chance to refill fluid, grab ice, dump water over your head, and reset your core before you head back out into the sun. The runners who finish here are usually the ones who slow down at the aid, cool off properly, and leave under control, not the ones who sprint through to save a minute.

The sand: it grinds you down all day

The footing is the second thing that wears people out. Loose sand and soft grass do not look hard on a map, but they steal energy out of every step, and over a hundred miles that adds up to a lot. Your feet slide, your calves and hips work overtime, and your pace runs slower than the flat profile suggests it should. Do not fight it. Shorten your stride, keep your cadence light, and accept that your splits will be slower than a road or hardpack course.

Take your feet seriously too. Sand gets into everything, so gaiters and a blister plan are not optional out here, and a quick sock-and-shoe reset at your drop bag can save your race in the back half. Small problems with hot, sandy feet become big problems over sixteen loops.

The night, crew, and drop bags

If you make it through the first afternoon and evening, the night is your reward and your chance to actually run. The temperature backs off after dark, though the humidity hangs on, so it never gets crisp the way a desert hundred does. This is where well-paced runners claw back time on the people who cooked themselves in the sun. Keep eating, keep your light and batteries sorted, and use the cooler hours while you have them.

The loop format makes this race unusually friendly for crew and drop bags. Your people see you every lap at the start/finish, and your drop bag is right there every 10K, so you can stage ice, fresh socks, dry shirts, caffeine, and real food and reach them constantly. Lean on that. A short, organized stop every loop or two to cool down and refuel beats one long meltdown at hour twenty.

The late-race lows and the 135

The back half is where heat hundreds get dark. Even after the sun goes down, the cumulative toll of the afternoon, the sand, and the dehydration catches up, and a lot of people quit at the start/finish simply because it is right there every lap and the tent looks so comfortable. Decide in advance that you do not stop moving unless you are truly in trouble. Break the race into loops, not miles, and just go get one more lap.

The newer Habanero 135 stacks even more on top of all this, starting Friday evening so the longest runners take on an extra night and a second full day of Texas August heat. It is invitation-tilted and aimed at experienced ultrarunners for a reason. Whatever distance you pick, the plan is the same: respect the heat, run the loop count down one at a time, and let the night be the part where you finally move.

Pacing strategy for a flat, brutally hot loop race

The Habanero is not about climbing, so forget vert-based pacing. This is about effort in the heat and on soft sand. Run the first afternoon slow on purpose, then let the night come to you.

Pace the heat and the sand, not the flat profile

Your flat-ground pace will lie to you here. The loose sand and the heat both slow you down, so chasing a road-pace target is the fastest way to blow up in the sun. Run by effort, keep it easy through the hot hours, and let your pace be whatever the conditions allow. A grade-adjusted pace tool helps you reframe what a given effort actually buys you on soft, draining footing, so you stop expecting flat-course splits and start running the race in front of you.

Build a heat-honest finish prediction and work it back to the clock

Do not set your Habanero goal off a cool-weather hundred time. The noon start and the August heat add real hours, and the sand adds more. Build a realistic finish window with a race-time prediction, then work it back into the 30 hour overall cutoff and the roughly 4:00 PM Sunday loop cutoff so you know how much buffer each lap is supposed to leave you. Because it is a 10K loop, you can check yourself against that plan every single lap and catch a slow fade before it becomes a DNF.

⏵ Free tools to pace this course

Fueling and hydration for the heat

At a race this hot, hydration and sodium are the main event and carbs are the thing you have to keep forcing down. Get the fluid and salt wrong and fitness will not save you.

Hydration and sodium: the real race

Sweat losses in this heat and humidity get enormous, so you drink to a plan, not to thirst, and you bias sodium high. Many runners need somewhere around 700 to 1,000 mg of sodium per liter of fluid here, and salty or heavy sweaters need more. The short 10K loop is a built-in advantage: you hit the start/finish aid every lap, so refill, take ice, and cool your core every single time instead of rationing across a long gap. Weigh yourself before and after a hot long run to learn your real sweat rate, then build the plan around your own number.

Carbs: keep forcing them down when your gut quits

Still aim for roughly 60 to 90 grams of carbohydrate an hour, but go in knowing the heat will crush your appetite in the afternoon and slow your stomach down. Keep your fuel steady, simple, and easy to swallow, and lean on things that go down when food sounds awful, like sports drink, gels, and a bit of cold real food from your drop bag each lap. Practice your exact race-day carb rate on hot long runs so it feels routine, not like an experiment you are running for the first time at noon in August.

⏵ Build your fueling plan

Get a carb, sodium, fluid, and caffeine plan per hour built for your weight, your goal time, and the Habanero heat 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 exact Habanero loop and heat, and your projected lap splits. Summit Line reads your real training, builds a plan for the conditions, and rehearses your hydration and fueling so race day is something you execute, not guess at.

Start free →Explore the demo

Habanero Hundred FAQ

How hard is the Habanero Hundred?

It is one of the hardest hundreds in the country to finish, and almost none of that is about the climbing. The course is a flat-ish 10K loop with only about 280 feet of gain a lap, but it starts at high noon in the Texas August heat with a real feel that is regularly above 100 in heavy humidity, on loose sand that eats your legs. The heat is the whole race. Attrition is brutal: between 2015 and 2024 only around 162 people had finished the 100 mile distance at all, and in some years the hundred-mile finish rate has been roughly one in four. If you respect the heat and pace it like a survival effort, the 30 hour clock is generous; if you do not, the sun ends your day.

Why does the Habanero Hundred start at noon?

That is the point of the race, not an oversight. Trail Racing Over Texas built the Habanero as the hottest trail race in Texas, so it sends you out at high noon in August straight into the worst of the heat instead of letting you bank cool miles first. You run the brutal afternoon on fresh legs and earn the cooler night by surviving it. It flips the usual hundred on its head, where you usually get a cool start and dread the next day. Here the hardest hours come first, and if you make it to dark you finally get some relief.

How should I fuel and hydrate for the Habanero Hundred?

Treat hydration and sodium as the main event and carbs as the thing you have to keep forcing down when the heat kills your appetite. Sweat rates in this kind of heat and humidity get huge, so you bias sodium high, often around 700 to 1,000 mg per liter of fluid or more for salty sweaters, and you drink to a plan instead of to thirst. For carbs, still aim for roughly 60 to 90 grams an hour, but expect your gut to fight you in the afternoon, so keep intake steady and easy to swallow. The short 10K loop is actually a gift here because you pass the start/finish aid every lap, so use it to refill, ice up, and cool down. Run your own numbers for your weight and the forecast with the free ultra fueling calculator.

What are the cutoff times for the Habanero Hundred?

The hundred and longer events run on a 30 hour clock, from the noon Saturday start to 6:00 PM Sunday, and the shorter distances get a touch less. There is also a hard loop cutoff around 4:00 PM Sunday, meaning you cannot head out for another lap after that, so your buffer has to be real, not last-minute. Because the course is a 10K loop, you can track your pace against the clock every single lap, which makes it easy to know exactly where you stand. Always confirm the current overall and loop cutoffs in the official race details before you start.

What is the terrain and weather like at the Habanero Hundred?

The loop at 7IL Ranch is a mix of loose sand, grass, and gravel ranch road with almost no shade, so it is not technical but the sand grinds your legs down lap after lap. There is very little climbing, only about 280 feet a loop, so this is not a vert race. The weather is the course: mid-to-late August in this part of Texas means a heat index commonly at or above 100, high humidity that stops your sweat from cooling you, and relentless sun in the open. The night brings some relief, but the humidity hangs around, so do not expect it to cool off the way a desert race does.

Is the Habanero Hundred a good first 100 miler?

Honestly, I would not pick it as a first hundred unless you specifically want a heat test and you know how to handle yourself in it. The flat, loopy, crewable, well-aided format is beginner-friendly on paper, and the short loop means you are never far from help or a drop bag. But the heat turns it into one of the lowest finish-rate hundreds out there, and that is a tough way to learn pacing and hydration. If you do choose it, train your gut and your heat tolerance hard in the weeks before, build a strict drink-and-salt plan, and treat the first afternoon as pure survival. Get through the heat and the night, and the clock gives you room to finish.

This guide is independent and for planning only. The course details, dates, start times, 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.