Let’s be honest—long runs sound intimidating when you’re new.
I still remember my first one like it was yesterday. I had butterflies, a loose plan, and my girlfriend half-jokingly suggested I should keep an ambulance on speed dial. An hour on my feet felt like a death sentence.
But I didn’t keel over. I finished. And eventually, those scary long runs became the backbone of my training.
If you’re new to running—or just trying to get consistent—this guide is for you.
I’ll walk you through what a long run actually is, why it matters, how to prep for it, how to pace it, and how to survive it without hating your life.
I’ll also bust some tired advice (you don’t have to blast music every time), and share some personal and community stories that’ll hopefully make you feel less alone out there.
If you’re feeling unsure about long runs, don’t worry—you’re not the only one.
By the time we’re done, you’ll know exactly how to tackle them with confidence. And maybe, just maybe, you’ll start to enjoy them too.
What Actually Counts as a Long Run?
Forget the internet’s one-size-fits-all definitions.
A “long run” is any run that’s longer than your usual distance. That’s it. If you usually do 3 miles, then 4 or 5 is your long run. It’s relative.
For some beginners, a long run means 60 minutes of easy jogging. For others, especially those with more mileage under their belt, it might be 90 minutes or even 2 hours.
But don’t worry about what advanced runners are doing—you’re not them. Yet.
One beginner on Reddit shared how ditching the mileage and switching to time—just aiming to run for 60 minutes—completely changed their mindset. They stopped stressing about numbers and actually started enjoying their runs. I’ve had athletes do the same, and it works wonders for progress and sanity.
To give you a loose number, many runners start to feel the “long” in a run around the 10K (6-mile) mark. But again—this isn’t gospel. If 3 miles is your usual, and today you go for 4, you’ve earned the long run badge.
What matters most? That it stretches your limits. That’s how you grow.
And here’s the cool part—what feels hard now won’t stay that way. My first hour-long run felt like a big, scary mountain. These days? That’s my warm-up.
You’ll get there too. Promise.
How Far Should Your Long Runs Be?
“How long should my long run actually be?”
I’ve heard that question a thousand times. And here’s the thing—there’s no one-size-fits-all answer. It all depends on your current shape and what you’re training for.
Back when I first started, a “long run” for me was maybe 3 miles—and even that felt like I’d conquered Everest. But over time, that number grows. For one runner, 5 miles is a grind. For another, it’s a warm-up lap.
Still, I’ve coached enough folks to know the sweet spots. So here’s what I usually recommend, based on your race goal (and yes, this comes from experience and real-world results):
Training for a 5K?
Shoot for 6 to 8 miles at your peak. Yeah, I know—it’s way longer than the 3.1-mile race. But that’s the point. Running easy at double the distance makes the 5K feel short and snappy.
Most cookie-cutter plans stop around 5–6 miles, but I like my runners to build a bit more. When you’ve got 7 or 8 miles under your belt, race day feels like a victory lap.
Going after a 10K?
Aim for 8 to 12 miles. The 10K is 6.2 miles, so training past that helps you stay strong the whole way. I’ve seen runners hit 10 miles in training and suddenly crush their PR without even changing anything else.
Eyeing a Half Marathon (13.1 miles)?
You’ll want long runs to land somewhere between 10 and 15 miles. Some plans stop at 10–11, thinking adrenaline will carry you the rest of the way. That’s fine if you’re tight on time.
But I like my crew to touch 12 at least once or twice before race day. If you can swing 14 or even 15 safely, even better. Just don’t force it.
Going all in on the Marathon (26.2 miles)?
You’ll often see long runs topping out at 20–22 miles. That’s where most training plans cap it. Going the full distance in training? Usually not worth it—recovery is brutal, and the injury risk shoots up.
Research backs this up: after 3 hours of running, fatigue ramps up while benefits drop. That’s why I tell my athletes to cap long runs around 3 hours, even if it means you don’t hit 26 miles.
Two solid 20-milers are way safer—and more useful—than one reckless 26-mile sufferfest.
My Rule of Thumb (and Reddit’s Too)
A solid guideline: your long run should be about 20–30% of your weekly mileage.
- Run 20 miles total per week? Your long one should land around 4 to 6 miles.
- Cranking 40 miles a week? Then think 8 to 12.
Also, follow the 10% rule—don’t jump your long run (or total weekly mileage) by more than 10% each week. If you did 5 miles last weekend, don’t leap to 8. Make it 5.5 or 6. That’s how you grow without blowing out your knees.
I learned that the hard way. Once jumped from 8 to 12 miles in a single week—my knees were toast.
Lesson learned: build smart, not fast.