Dublin...so North of Hillard a good bit.
I had a good friend, Bob Bachtel, that was killed while racing the Calvin Challenge several years ago. After that event I can see why you wouldn't want to do TOSTV...especially if the weather is the traditional 'Headwinds & Driving Rain' Both Days'!
Is this the path that can be seen from I270? And IIRC there is also a trail that can be seen from 315.