The Old Steilacoom-Olympia Road Historical Marker is a significant landmark in Steilacoom, WA, USA. It commemorates the original wagon route that connected Fort Steilacoom to Olympia. The marker was placed on the spot where an oak tree was planted by D.S.B. Henry, a surveyor, back in 1872. This historical site is located at 703 Olympia St, Steilacoom, WA 98388.

Incorporated in 1854, the town of Steilacoom played a critical role in developing road systems within Washington Territory. The Old Steilacoom-Olympia Road was part of a broader system called the Old Military Road, which facilitated transportation and communication during those times. This network of roads featured several stretches converging locally, which led to the creation of various historical monuments, including pyramid-shaped markers scattered around Pierce County.

The Old Steilacoom-Olympia Road Historical Marker stands as a reminder of the areas rich history and its importance in connecting communities during the early days of Washington Territory. Its unique attributes include the oak tree planted by D.S.B. Henry and its location along the original wagon route to Olympia, both of which contribute to an engaging and informative experience for visitors on a tour.