How long can you run for?

About 30 seconds.

My longest was a marathon, so 4hr and 53 minutes! When I started, it was one very long minute.
The range of answers you've had OP illustrates for me the best thing about running. Some people are happy at short distances, some very long (wow wrongornot!), some do races or park run every week, some people would be happy never to do a race. And all of this is fine, running can be what you want; can't be bothered with people who think you have to go a certain speed or run a certain distance.
Well done on your 15 minutes, hope you carry on and enjoy it.

Ona treadmill max 30 mins. Bores me to death.

Outside 2 hours is what i take to run a HM.

Stop start Marathon took over 5 hours.

Longest I’ve ever run in a treadmill is about 40minutes.

Longest outside is 2.5 hours (my slowest half marathon - it was on trails).

6 hours 1 minute and 32 seconds that's how long it took me to run 33 miles last month.

2 years ago I couldn't run for 30 seconds and had to repeat week 1 of c25k 3 times!

I never tried my limit but what would be the point? I usually run for 30 minutes because I think it's enough for me. It gives me enough cardio fitness and running more would just make me lose weight. I don't understand people who run for hours. They just look tired and haggard. Waste of time.

About an hour and half. Do 10k in just over an hour and can do 5k in under 30 minutes on a good day. Never run more than 30 minutes on a treadmill though, it's much harder than running outdoors.

I’ve just completed c25k too and now running with a running club. Can do around 6k in 40 mins but aiming for 7k tomorrow. Wish me luck

I don't know, depends on terrain, but I'm not really doing more than 5k at the moment, which including a brisk walking warm up takes about 34 mins. I ran just over 5k in a local Santa race at the weekend, which was muddy, slippy, occasionally hilly and with lots of bottlenecks, so took me a bit longer to get around!

I too don't enjoy running with other people, it just leads to self-loathing about why I can't go faster, especially when they talk about 5k taking less than 30 mins, and a slow 10k being under an hour (the one time I ran a 10k, it took me about an hour and 13, and it was a big achievement for me but completely spoiled by how slow it was compared to friends. They were all really encouraging, but it still made me feel like crap).

An hour no problem (outside not on the treadmill, an hour and a half would be pushing it. I am not very fast.

About an hour and a half, without stopping. I've never tried to run for longer though!

A couple of hours if I go slowly

Comfortably, 2 hours. I can run a half marathon in an hour and 45 minutes, and was doing 2 hours in the run up to my last half. Never pushed myself beyond 2 though - too much else to do in the day!

600paces,slowly. Still, you have to,start somewhere

I can run for about 10K which takes me about 80mins. At that pace you can hardly call it running but I will be 60 next month.

Well, I sometimes enjoy it ThickandThin I decided to do Couch25k last year when I was 50 and doing a park run was my aim too.

TBH I hated the ruddy park run. Everyone else ran much faster and it destroyed a lot of my pride and pleasure in running. I realised sadly that I am fairly shit (whereas up til then, in my head, I was hearing Chariots of Fire and looking smooth). And my offspring, who I had MADE come and watch my triumph stood gloomily around in the cold and the only comment they could manage was to inform me that the man in the wheelchair beat me.

(He was very fit and looked like an ex serviceman).

I realised I hate running with other people. The only time I really like running is in the dark and on my own. When I still occasionally hear Chariots of Fire in my head.

And yes, as pp said, secret is just going slower. Like really much slower. Honest, if you mapped put a two mile loop from your house, put on your trainers tomo and ran it really slowly, you'd totally be able to run it all. I promise you.

Never tried for longer than 2 hours. I'm doing a marathon next year, so need to double that.

About 2 hours and 20 minutes, slowly round a half marathon.

On a treadmill probably about 10 minutes before I got bored... I am a freak who likes running in the rain!

Fifteen minutes of non-stop running is ace. Tbh honest, it's a lot easier after those first fifteen minutes. They are the worst. Because they are so bad, you think it will be harder to run further, but in fact it's easier.

I can comfortably run for an hour and a half, uncomfortably I could probably make it to two hours. That's outside. I love treadmill for speed work, but would be very bored on treadmill for any length of time.

About an hour and a half. About 15k.

The secret is to go slow! In july i ran an ultra marathon, stupid bucket list idea, 7.5 hrs later i had a shiney medal and was very stiff. I like to do 3/4 miles a few times a week which takes about 40 mins and then once a month do a 10 miler.

I can run for 45 mins on treadmill and about an hour outside.

I started running in Feb and when I started I could only run for a few minutes before stopping. Try adding a minute or two every time if you want to build it up - and download the app MapMyRun it's really motivating to see an improvement on your previous run.

Without stopping? About 3 hours