I didn’t see a topic for this and for some reason I had it on my mind. One such highway that I frequent which ends at the gate of a military base is CA 282 which ends at a gate for NAS North Island.
There are topics for highways you supposedly can't clinch without entering a military base. This topic is broader than that, covering highways that end at or really close to a base gate, but can be clinched without entering the base.
As 74/171FAN notes, NJ 68 is one of the few routes that actually extend past a military base gate, extending less than a quarter-mile into Joint Base McGuire-Dix-Lakehurst. NJ 68's south endpoint was established before public travel was restricted within the base, and apparently was never truncated after the restriction took effect.
There are other instances mentioned here where you don't have to enter the base to clinch, even though the route ends at or very close to a base gate. I'll cover those and others when I'm more awake.
Fort Leonard Wood is at the end of "Business Loop 44" in St. Roberts.
Unless something has changed since I last traveled through St. Roberts, there's both a Business Loop 44 and a Business Spur 44 in St. Roberts. The Business Spur route is the one that connects the mainline I-44 to Ft. Leonard Wood.
Travel Mapping's predecessor site Clinched Highway Mapping had the business spur actually entering the Army base, continuing past the base gate. At some point, that was corrected to have the spur ending at or just north of the gate, which is what TM shows now.