⏵ Course guide · Whiterock Conservancy, Iowa
The Whiterock Ultra runs 50 mile and 50K races over a set of Red, White, and Blue loops through Whiterock Conservancy in Coon Rapids, Iowa, all based out of River Campground. I will walk you through the loop course and cutoffs first, then give you a pacing and fueling plan built for a warm late-July Iowa day. There are free calculators along the way to dial in your own numbers.
These facts come from the official Whiterock Ultra website and its course page. Check the current year athlete guide before you commit. Race logistics can change year to year.
Every distance at Whiterock is built from the same three color coded loops, out of River Campground, just in different combinations, so knowing the loops is really knowing the whole course.
The Red Loop heads east from the start line, connects with the Main Loop Trail, and winds through Bluebell Trail and White Oak Trail before passing through Oak Ridge Campground and back to River Campground. The 50 mile runs this loop twice, the 50K once.
The White Loop crosses the Fig Ave bridge and links Shooting Star, Big Dipper, and Little Dipper Trails, passing Star Field campground along the way, with an optional aid stop back at River Campground partway through. Race organizers describe this as the hilly loop in their own training-run announcements. The 50 mile runs it twice, the 50K once.
The Blue Loop is the only loop both distances run just once. It climbs Redrock Climb, follows the Steve Garst Trail into the town of Coon Rapids itself, passes an aid station at Garst Family Pond, and returns via the Main Loop Trail and Fig Ave back to the finish at River Campground. This is the loop most likely to use gravel road and short pavement sections.
With roughly 3,000 feet of climb in the 50K and 5,000 feet in the 50 mile spread across repeated Red and White Loops, the climbing adds up gradually rather than hitting you in one big crux.
Starting at 12:01am means your first Red and White Loops happen in the dark, well before the 7am 50K field even starts. Practice night pacing and headlamp management on training runs, and treat the early loops conservatively since you have 17 hours and two full trips through both the Red and White Loops ahead of you.
Since the 50K runs each loop only once, in Red, White, then Blue order, you never repeat terrain, which means no chance to correct a pacing mistake on a familiar climb the second time through. Use the Camp Whiterock preview weekend or the individual loop training runs the race hosts before race day to know exactly what is coming.
⏵ Free tools to plan your effort
Late July in Iowa can bring genuine heat and humidity, and the race's own inclement-weather notes flag that aid stations may have little to no support after 5pm, so plan your fueling around that timing.
Aim for roughly 60 to 90 grams of carbohydrate per hour while moving and sodium in the 300 to 700 mg per liter range, leaning toward the higher end if the day runs hot and humid. The loop format brings you back through River Campground repeatedly, so stage extra supplies there if you are running the 50 mile's two full loop cycles.
⏵ Build your fueling plan
Get a carb, sodium, fluid, and caffeine plan per hour built for your weight and your chosen distance 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 repeated-loop climbing the Red, White, and Blue course demands. Summit Line reads your real training, builds the durability your chosen distance asks for, and rehearses your fueling so race day is something you execute, not guess at.
The Whiterock Ultra is a 50 mile and 50K trail race at Whiterock Conservancy in Coon Rapids, Iowa, run on a set of color-coded loops, Red, White, and Blue, that connect through the conservancy's trail system and a bit of the town of Coon Rapids. The 2026 race is confirmed for Saturday, July 25, 2026.
Both distances share a 5pm cutoff, but they start at very different times. The 50 mile starts at 12:01am, giving 17 hours to finish, while the 50K starts at 7:00am, giving 10 hours. If the 50 mile start is delayed more than 2 hours, those runners are moved into the 50K starting at 7am instead, and if the 50K start is delayed more than 2 hours, the course is shortened to keep the same 7pm-adjacent cutoff window.
The official course page states approximately 3,000 feet of climb for the 50K (one loop each of Red, White, and Blue) and approximately 5,000 feet for the 50 mile (two Red Loops, two White Loops, one Blue Loop). Neither figure is extreme by ultra standards, but the climbing is spread across a lot of short, punchy hills rather than one long grind, which adds up over repeated loops.
The course mixes genuine singletrack and equestrian trail with some easier gravel and short pavement sections, and the White Loop in particular is described by the race itself as hilly. Repeating loops, especially the Red Loop twice and White Loop twice in the 50 mile, means you will know exactly what is coming the second time through, which can help pacing but also makes the repeated climbs feel more mentally taxing late in the race.
The 50K, with a 10 hour window and a course you get to preview at the optional Camp Whiterock weekend before race day, is a reasonable first-ultra choice: the loop format means you are never more than about 12 miles from the start/finish aid at River Campground. The 50 mile, starting at midnight with 17 hours to finish, asks more of your overnight pacing and sleep management and is better suited to someone who has already completed a shorter ultra.
The race has a documented inclement-weather and rain-route policy. If rainfall exceeds roughly 1 inch, the course may switch to a modified route that substitutes gravel roads for parts of the White Loop, and runners are required to carry a safety vest if that rain route is used. Race officials can also delay the start by up to 2 hours, or pause the field's time at the River House aid station if conditions turn severe mid-race.
Late July in Iowa can run hot and humid, so plan for the higher end of typical ultra fueling ranges: roughly 60 to 90 grams of carbohydrate per hour while moving and sodium in the 300 to 700 mg per liter range, leaning up if the day turns warm. The loop format means you pass through River Campground and its aid station repeatedly, which is a real advantage for restocking supplies compared to a straight point-to-point course. Build your own numbers with the free ultra fueling calculator.
Link this guide
Race directors and clubs: link or embed this guide anywhere. It stays current.
<a href="https://runsummitline.com/guides/whiterock-ultra">The Whiterock Ultra course guide</a><iframe src="https://runsummitline.com/embed/race/whiterock-ultra" style="width:100%;max-width:420px;height:180px;border:0;" loading="lazy" title="Whiterock Ultra course guide by Summit Line"></iframe>This guide is independent and for planning only. The date, cutoffs, and course details come from the official Whiterock Ultra site and can change year to year, so confirm the current specifics with the athlete guide before you register or run. The fueling and pacing advice is general and not medical advice.
The timeline
Get the week-by-week countdown for this race: when to build, when to peak, when to taper.
One email with the timeline, plus training notes for this race. Unsubscribe any time.