⏵ Course guide · Iowa backroads ultra
Booneville Backroads Ultra sends its 10K, 50K, 100K, and 100 mile fields across gravel and level B roads through the Bridges of Madison County and rural Iowa countryside, with no course markings to lean on. I will walk you through the self-navigated format first, then give you a pacing and fueling plan for thousands of feet of rolling gain, plus free calculators to dial in your own numbers.
These facts come from the official race website. Check the current year details, distances, and start times before you commit. Race logistics change year to year.
The race runs across gravel and level B roads through the Bridges of Madison County and the surrounding rural Iowa countryside, with four distances sharing the same backroads network at different lengths.
This is a fully self-navigated race. There are no course markings on the level B roads, so every runner needs printed turn-by-turn cue sheets, prepared and printed before the start since none are handed out on race day, or a GPX file loaded onto a phone or watch, with a backup plan in case that device fails. Study your route before you show up, not on the fly.
A level B road is minimum-maintenance, which the race itself describes as an ooey, gooey, muddy mess whenever it is raining or has recently rained. That terrain, stacked across thousands of feet of rolling gain rather than one big climb, is what the organizers mean when they call this course some of the gnarliest backroads you will encounter in wet conditions.
The #Tuffest10K, 50K Solo, 100K Solo, and 100 Mile Solo all draw on the same gravel and level B road network southwest of Des Moines, staggered with earlier starts for the longer distances so everyone finishes within a manageable window.
With no single defining climb, this course wears you down through repetition: hill after hill on gravel and level B roads, compounded by the mental load of self-navigating every turn.
Checking a cue sheet or GPX at every turn costs real minutes over a 50K, 100K, or 100 mile distance, especially after dark or when fatigue sets in. Build that overhead into your goal time from the start rather than assuming your flat running pace translates directly to your finish time here.
A grade-adjusted pace target helps you run the hills by effort rather than trying to hold a flat number across terrain that never really flattens out. A race-time estimate built from your own training then gives you an honest target for whichever distance you choose, accounting for thousands of feet of gain rather than a single big mountain day.
⏵ Free tools to pace this course
With early starts staggered from 5 AM for the 100 mile and 100K up to 8:30 AM for the 10K, you will cover ground in cool morning air and warmer Iowa afternoon conditions if you are out for the longer distances.
On a course this rural, plan your carbohydrate intake, roughly 60 to 90 grams per hour for the 50K and up, around your own supply rather than assuming frequent aid access, and confirm current aid station spacing with the race director before you finalize your plan.
Sodium in the 300 to 700 mg per liter range covers most runners, and Iowa in early September can still deliver a warm, humid afternoon even after a cool 5 or 6 AM start, so plan to scale up as the day goes on for the longer distances.
⏵ Build your fueling plan
Get a carb, sodium, fluid, and caffeine plan per hour built for your weight, your goal time, and a warm Iowa Labor Day weekend 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 rolling level B road terrain, and your chosen distance. Summit Line reads your real training, builds a plan for sustained rolling gain, and rehearses your fueling so race day is something you execute, not guess at.
The organizers describe thousands of feet of elevation gain and seemingly endless hills across gravel and level B roads southwest of Des Moines, and level B roads are minimum-maintenance roads that turn into a genuinely muddy mess in wet conditions. Add in a fully self-navigated format with no course markings, and this is a race that tests route-finding discipline as much as fitness, especially deep into the 100K and 100 mile distances.
No. The race has no course markings on the level B backroads, so every runner is required to carry printed turn-by-turn cue sheets, prepared before the start since they are not handed out on race day, or a downloaded GPX file on a phone or watch, with the organizers recommending a backup in case your primary navigation fails.
There are four options: the 100 Mile Solo and 100K Solo both start at 5:00 AM, the 50K Solo starts at 6:00 AM, and the #Tuffest10K starts at 8:30 AM, all on Saturday, September 5, Labor Day weekend.
With thousands of feet of climbing on exposed gravel and level B roads and distances up to 100 miles, aim for roughly 60 to 90 grams of carbohydrate per hour for the longer distances, and keep sodium in the 300 to 700 mg per liter range, adjusting for a Labor Day weekend that can still run warm in Iowa. Build your numbers with the free ultra fueling calculator before race day.
The course runs through the Bridges of Madison County and rural Iowa countryside on gravel and level B, minimum-maintenance roads. These roads turn ooey, gooey, and muddy if it has rained, and the organizers are explicit that no vehicle, support or otherwise, should ever drive down them wet or dry. Expect rolling hills that add up to thousands of feet of gain rather than one defining climb.
Packet pickup is Friday, September 4 from 5 to 8 PM at REI West Des Moines, with no option to pick up on race morning. Race day parking is only allowed on paved surfaces at Badger Creek State Recreation Area, and there is no on-site camping, so plan lodging in the West Des Moines area, ideally near I-35 or I-80, and book early since Labor Day weekend campgrounds nearby fill up fast.
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<a href="https://runsummitline.com/guides/booneville-backroads-ultra">The Booneville Backroads Ultra course guide</a><iframe src="https://runsummitline.com/embed/race/booneville-backroads-ultra" style="width:100%;max-width:420px;height:180px;border:0;" loading="lazy" title="Booneville Backroads Ultra course guide by Summit Line"></iframe>This guide is independent and for planning only. The course details, dates, and format 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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