Treadmill is the most comfortable for me, my joints hurts much less than on any other surface. Plus, the forward momentum keeps me going for much longer than I can running outside!

i love thredmill — easier for me to keep my pace.

i actually run a lot farther when i run outside - i belong to a gym, but ever since i started running in central park, it bores me to tears to run on the treadmill. i do it when the weather is bad or if i want to work on my speed, but the endurance of running all the hills on the road in the park keeps it interesting for me.

I live here in Arizona, its great! The dirt trails and beautiful landscape all in one workout. Dirt trails are for me and my knees!

I like to run on the treadmill so I can track both my pace and distance. When I run outside I feel like I never know how far I have ran.

I'm lucky enough to live in beautiful Southern California, where it's warm most of the time. Since I live in the hills, it makes for a great and very challenging run! It just makes sense to go for a run outside for me...I also find it distracts from the time and distance and like laellavita I go much further.

Dirt, not because it feels better (which it does) but because it's more interesting and engaging to be on the trails. I hate, hate, hate the treadmill, hard on knees and deadly boring.

I like them all

anything except sidewalk or pavement. my knees hurt! i'm an old lady!

treadmill! I love watching All My children at the gym while on it and laughing

I like running on dirt trails too.

Not only is it more forgiving and you have the added "stabilizing effect" you also get to be away from busy streets and leering strangers.

I'm Canadian and Canadian weather is unpredictable (sunny one day, snow/hail the next or a combo of both)...well at least in Toronto-so the treadmill is my best surface.

That is, if i could run. Which I can't thanks to my leg problems. Elliptical, take me away!

I like dirt trail for the ease on my joints, but also because they usually have the nicest scenery!

I feel like the treadmill pushes me to workout a little harder, a little longer. I use to prefer to run tracks, but after running a treadmill for the last few months, it's become my new favorite.

I run on the grass next to the sidewalk if I can. Now that I am in the city I don't happen upon grass too often but I do my best!

I just dont push myself hard enough on the treadmill to make it worthwile. I'm an outside person. To each her own!

I miss running.... I used to be a pavement pounder, and the treadmill for speed work or nasty days.

to those who do'n't know how far they have run outside-- check out mapmyrun.com! it's awesome.
In warm weather i usually run outside on the road, but in cold i always go to the gym.
I am an utter cold wuss. haha.

I cannot believe how many people CHOOSE the treddy! I'll rather run through snow in 20* or wake up at 5:00 am to beat the summer heat than run on the treddy. UGH.

I perfer pavement but get stuck on sidewalk, which blows for the joints, but... it beats the treddy

I like running on pavement or a track. I don't like sidewalks because our city's sidewalks are crappy and full of holes and it's really easy to trip.

Pavement or sidewalk... don't prefer machines, but stick to them because I haven't really found anywhere safe to run. (Live in a safe neighborhood but you never know...)

Running on the road works best for the Canadian winter, the sidewalks do not often see much plowing.

Treadmill because the ones at the gym have shock absorbers, so the impact doesn't feel as bad. Also, I'm afraid of the sun, lol.

I love running down by the pier, even in the winter time. Nothing quite like getting in a good 10-15 miles and soaking up that fresh NY air!

i used to NEVER run on a treadmill but ever since i broke my knee - it's my preferred surface since i have the ability to take some of the weight off my knee while i'm working out IF and only if i have to.

grass!

wow i'm surprised so many people like treadmills the most. so do i!