Making My Walks Meaningful... In A Virtual Sense

I've got a problem staying motivated when it comes to daily walking. After a while I get bored. This time around I decided to set a goal. I'm going to walk from the mouth of the Mississippi River to the river's beginning in Minnesota. I've found some web sites to help me with this virtual walk and I'll use Google's pedometer mapping function to record my daily progress along the river. I'll do a bit of research through each place I visit to keep it 'real'.