Trails will have a lot of varied terrain. It will be uneven and there will be inclines and declines. The best way to train would be to run trail, but failing that just make sure to vary the incline/decline settings at random intervals to replicate a course. Remember, when your off concrete, theres less impact so this sort of training will be better for your knees

The thing I notice most when I run on trails is the uneven terrain. It can (and did) make my ankles really sore, as I'm constantly re-adjusting to compensate for the terrain. I also suggest getting trail running shoes, they helped me a bit more on rockier terrain where my normal shoes just didn't give as much support.

BUT... trail runs are super fun

Definitely don't use your hiking shoes! And it really does depend on the terrain of the trail as to whether or not you'll need trail running shoes. You can get away with road shoes on some easy trails. You might check the race website to see what they suggest. Also, trail runners can vary quite a bit from really aggressive (heavily lugged soles for mud, snow, etc) to just a heavier version of a road shoe. If you're gonna try trail runners, really try to get in a few runs in first on trails in the new shoes.

Plan to take it slow, especially if there are lots of rocks, roots, and holes. Don't be surprised if your trail time is slower than your road time - that's normal.

If there is any way you can get in some running time on some trails, that would be ideal, especially if the race course is difficult.

Have a great time! Running trails can be addictive - the beauty of the landscape, the challenge of the terrain, and the laid back atmosphere is awesome!

Depending on the trail, it could be a world of difference.
If it's a hilly, snakey single track, you can only simulate that by running on one. If it's a smooth crushed rock "trail" then it shouldn't be too bad.

Ditto. I did a Winter Trail Quarter Marathon (at night!) which is just slightly longer than 10K and it was a ton of fun. However, it was also snowy and sloppy wet and treacherous with mud 3" deep in places. That race was much harder than mile road Half-marathon.

So, it really does depend on the trail AND what condition it is in at the time you run it. My advice would be to get a map of the trail in advance and give it a preview before the actual race. Best of luck!

You should be able to find the course information on the races' website.

If it is truly a "Trail Run" I would not attempt it unless you have ran a couple times on a similar trail.

Trail running to me is: Roots, rocks,hills and gaps. It can be treacherouse if you are not prepared.

On the other hand some trail runs are crushed gravel paths through trees:-)

Look up the offical page and it will tell you the terrain and usually the level of skill you should have to compete.

Best of luck!