Directions from Cincinnati/Lexington/Knoxville

I-75 South to I-640 East toward Asheville. (just north of Knoxville).
It merges with I-40 East... stay on this for 27 miles when you will exit/merge onto I-81 North towards Bristol.
Stay on 81-N for 56 miles.
Take exit 57A to merge onto I-26 E/US-23 S toward Asheville/Johnson City
after 15 miles Take exit 24 for US-321/TN-67 toward Elizabethton,
Turn right off exit onto US-321, in Elizabethton there is a slight left turn (about 8 miles from exit)
Follow US-321 Turning right at US-321 N/US-321 Scenic S
About 5 miles down the road you will turn left following US-321 S/US-321 Scenic S
This is a 2 lane curvey road. and you are about an hour from Todd. You will stay on US-321 until it merges with US 421 in Sugar Grove... US-421/US 321 will take you into Boone. Follow US-421 down King Street.
You will drive through a little bit of construction where they recently expanded the road... from here continue on Following Hwy 421 7.8 miles to Brownwood Rd. (you will pass a big Baptist Church on the right and Brownwood is the next left at the bottom of the hill.)
Turn left. Follow Brownwood for 3.2 miles until you come to a stop sign. Turn right onto Todd Railroad Grade Rd.