Set your GPS to the address and it will take you to the race site/parking area.
Driving N on I-35 take the first Guthrie exit (153-this is a left turn exit-after passing Seward Rd exit merge to the left lane). Go to the first stoplight and turn left onto Sooner Rd. Go to W Lake Rd (1/2mi - church on SW corner) turn right. This will take you to the race site.
Driving S on I-35 take the "second" (153) Guthrie exit. Follow the directions above to the race site.