There is a continuous trail that runs the length of the Golan Heights on an north-south axis, starting from a point that is parallel to Tiberias, and continuing to the parking lot at the base of the Mt. Hermon ski area (with another trail that goes all the way to the peak). The INT doesn't go on the Golan at all, so this trail provides a nice addition. I'm planning to hike the Golan Trail south-to-north, climb Mt. Hermon, then descend from there past Nimrod to Dan to pick up the official start of the INT. Here are some links, and it also appears on the newest Hebrew hiking map (#1):
http://www.golantrail.com/
The official site (in Hebrew, with maps of each of the 15 sub-sections):
http://www.golan.org.il/shvil/