From I-84 take exit 374 for Highway 201 South. Continue to Nyssa, turning left on Highway 201 south. Continue on that road for about 33 miles to Succor Creek Road and then drive 22 more miles. Turn right onto Leslie Gulch Road.
As can be gleaned from the directors, this is a remote location.
Oregon's Owyhee Canyonlands is the last great unprotected expanse of the American West. Leslie Gulch is one of the highlights of the area - the striking rock formations made of tuff.