Online mapping site showing grades along a route?

[1995hoo]

Does anyone know of an online mapping site where you can plot a route and then have it show the gradients along the way? Someone on another forum I visit just posted the following question and I thought maybe someone here could help.

Is there a map site that shows grades/ max grades along route?

Thanks in advance.

[Alps]

I am pretty sure you can get approximate grades out of Google Earth, but not anything online that I know of.

[1995hoo]

Thanks. He clarified the issue as follows. I have no idea what the answer is, but my thought is that the Pennsylvania Turnpike would be a better route than I-68 or Corridor H under these particular circumstances.

I want to pull a small sailboat/trailer from the Bay area in Md to Columbus Ohio for a regatta. Boat hull is 198 lbs, and with mast, boom, sails, cover, probably no more than 250. I assume the trailer would be 200-250, but as it's a borrowed boat, I don't know for sure. So all together, I'm assuming 500 lbs roughly. Towing vehicle is 1.8 l Honda Civic automatic. I used to tow my own boat all over the place, but it was a manual Accord with a 2.2 L engine. So I would like to minimize the maximum grade I'll face.