⏵ Course guide · Baltimore area trail 50K
Now in its 13th year, the Patapsco Valley 50K & 25K sends you through Patapsco Valley State Park's Avalon Area with a river crossing, technical downhills, and real cutoff pressure starting at your first loop. I will walk you through the course, the cutoffs, and a pacing and fueling plan built for the terrain, with free calculators along the way to dial in your own numbers.
These facts come from White Oak Running Company's official event page and live registration page. Elevation gain and exact loop mileage were not published there at the time of writing, so check the official page for those before you commit.
Start and finish are at CCBC Catonsville, with the running route itself in Patapsco Valley State Park's Avalon Area. The race's own description keeps it simple: ups and downs, a river crossing, technical downhill sections, and varied scenery.
50K runners have to complete their first loop by 12:15 PM or will be asked to discontinue. That checkpoint is the real gate on this course, so treat your early pace as a pass/fail test rather than something to bank time against later. Once you clear it, the overall race closes at 5:30 PM, with a 10 hour limit for an official finish.
5 well-stocked aid stations back up the technical sections, and the race has been running this exact venue for 13 years, so the logistics are well worn. Expect the river crossing to be a genuine feature of the day, plan for wet feet and adjust your footwear choice accordingly.
The 12:15 PM first-loop cutoff is the number to build your whole race around. Start conservatively enough to clear it with margin, then use the technical downhill sections as a place to control your effort rather than push.
With a river crossing and technical downhills in the mix, your splits will not be a flat, predictable pace. Give yourself real buffer against the 12:15 PM cutoff on your first loop, since a slow start on unfamiliar technical terrain can eat that margin fast. Once you are through, the 5:30 PM overall close and 10 hour official-finish window give you room to manage the rest of the day.
⏵ Free tools to plan your effort
With 5 aid stations along the course, plan your intake around them rather than trying to carry a full day's fuel yourself.
Aim for roughly 40 to 60 grams of carbohydrate per hour and sodium in the 300 to 500 mg per liter range as a starting point, adjusting for how your gut handles it once you are moving. Late October in the Baltimore area is usually cool, so fluid needs will likely run lower than a summer race, but keep drinking on a schedule rather than only when you feel thirsty, especially after the river crossing.
⏵ Build your fueling plan
Get a carb, sodium, fluid, and caffeine plan per hour built for your weight and a late-October Maryland trail effort 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 Patapsco Valley's river crossing and technical downhills. Summit Line reads your real training, builds the durability this course and its first-loop cutoff demand, and rehearses your fueling so race day is something you execute, not guess at.
The race itself describes the course as ups and downs with a river crossing and technical downhill sections, which points to a course where footing and grade changes matter more than any single long climb. Combined with a firm cutoff structure (your first loop must be done by 12:15 PM, and the race closes at 5:30 PM), this is a course that rewards steady, controlled running over aggressive early pace.
50K runners need to finish their first loop by 12:15 PM or will be asked to discontinue, and the race closes entirely at 5:30 PM. There is also a 10 hour limit for an official finish, with runners crossing after that recognized as an "Unofficial Finisher" rather than turned away outright. Build your pacing plan around the 12:15 PM checkpoint specifically, since that is the cutoff most likely to catch an underprepared runner off guard.
A river crossing and technical downhill sections mean this is not the flattest introduction to the distance, but the race has run for 13 years and is well organized, with 5 aid stations to lean on and a generous overall 10 hour window before you drop to unofficial status. If you have some trail miles under your belt and are comfortable with technical footing, this is a reasonable first 50K.
Every registrant gets a Brooks event shirt and an additional PV50K/25K logo premium item. Finishers of the 50K receive a hand-thrown mug, a distinctive local touch, while 25K finishers receive a medal. Post-race food is provided at the finish, and the course is supported by 5 well-stocked aid stations along the way.
As of this writing, the 50K is $140 and rises to $165 after July 31, while the 25K is $115 and rises to $140 after the same date. Pricing can change year to year, so check the official registration page for the current numbers before you commit.
Start and finish are at CCBC Catonsville, 800 S. Rolling Rd., Catonsville, MD 21228, with parking in Lot 6. The course itself runs through Patapsco Valley State Park's Avalon Area, so plan to arrive with enough time to park and walk to the start before the 50K's 7:30 AM or the 25K's 8:30 AM gun.
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<a href="https://runsummitline.com/guides/patapsco-valley-50k-25k">The Patapsco Valley 50K & 25K course guide</a><iframe src="https://runsummitline.com/embed/race/patapsco-valley-50k-25k" style="width:100%;max-width:420px;height:180px;border:0;" loading="lazy" title="Patapsco Valley 50K & 25K course guide by Summit Line"></iframe>This guide is independent and for planning only. Dates, cutoffs, and pricing come from official White Oak Running Company sources and can change year to year, so confirm the current specifics before you register or run. The fueling and pacing advice is general and not medical advice.
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