Trail vs Pavement vs Dreadmill

[Tri Girl]

I prefer trail running because it's not so monotonous. I like the constant changing terrain. I also find it's less stressful on the joints.
And I know it goes against what the whole rest of the world does- but I'm slower on the road. I seem to drag my feet and run more slap-footed. Part of it is I tire out much more quickly on the road than on the trail because the pavement beats my body up so much more.

I've always hated the treadmill, but this year was so cold that I was forced to run inside most of the time (with asthma- the cold is terrible for me- much worse this year than previous years). Now that it's warmer, the pollen has been so atrocious that my allergies are insane- and that means more running indoors so I can breathe.

Pretty much all of my marathon training (it's in 2 weeks) has been on the treadmill. I worry that my time at the race is going to be MUCH slower than normal because I haven't been running outside (with no motor to pace me- I won't push as hard).
Oh well- time doesn't matter much anyway.