Great Sierra Wagon Road
Also known as: Aspen Valley Road; Old Tioga Road
Why it's listed
This 17-3/4 mile stretch of the Great Sierra Wagon Road, also known as the Old Tioga Road, runs northeast from the western boundary of Yosemite National Park toward White Wolf Campground. A silver mining company built the road in 1882 to haul supplies to its mine on Tioga Hill. Surveyors H. B. Carpenter and H.P. Medlicott laid it out, and engineer Charles N. Barney directed construction. Chinese laborers, who made up a large share of the workforce, built drywall masonry retaining walls and culverts that remain in place. The mine failed soon after completion, and the road sat neglected until Stephen T. Mather acquired it in 1915 and deeded it to the government, and it opened to automobiles that July. A 1937 realignment bypassed Aspen Valley, leaving this section largely unchanged. The nomination cites its engineering, its link to mining, and its role in early motor access to the high country. Much of it is now closed to public vehicles.
Significance in brief: The road is of local significance in engineering, industry and transportation. Its largely unaltered drywall masonry retaining walls and culverts, built by Chinese laborers, reflect the engineering. It is also tied to silver mining in the region and to opening Yosemite's high country to the public and early motor travel.
Machine-generated summary. This summary was generated by a language model from the official nomination document and has not been reviewed line by line by an editor. It may contain errors. Check the source document before relying on any detail. Source: nomination document (PDF) · National Archives catalog entry. NRHP reference 78000373, listed August 25, 1978. Summary generated October 2026 (model claude-sonnet-5-5, prompt v1.0-2026-10-29, confidence medium).
Key facts
| Address | N of Yosemite Village, Yosemite Valley |
|---|---|
| County | Tuolumne County |
| Listed | August 25, 1978 |
| Reference number | 78000373 |
| Resource type | Structure |
| Period of significance | 1882, 1915 |
| Architect / builder | Great Sierra Consolidated Silver Co.; surveyors H. B. Carpenter and H.P. Medlicott; engineer Charles N. Barney |
| Areas of significance | Industry, Engineering, Transportation |
| Level of significance | Local |
| Status (as stated in the nomination) | Condition listed as good. The section from Aspen Valley to White Wolf Campground is closed to all but National Park Service vehicles as a fire road; the western section is open as an access route for area property owners. |
| Acreage | 107 |
| Coordinates | 37.84705, -119.77596 (NPS GIS) |
What listing means for this property
National Register listing is honorary: it recognises significance and does not restrict what a private owner may do without federal money or permits. It unlocks the 20% federal rehabilitation tax credit for income-producing buildings, state credits in many states, and Section 106 review when federal agencies are involved. See what listing means in practice.
General information, not legal or tax advice. Rules change; confirm with your State Historic Preservation Office or a qualified adviser.
Sources and further reading
- National Park Service, National Register of Historic Places database (snapshot May 2026), reference 78000373.
- Nomination form (PDF, National Archives) — catalog entry
- Wikipedia article (used for cross-checking only; text not reproduced here)
- Wikidata Q5599960
- This listing as JSON
Last updated October 2026. Found an error? See the editorial policy for how to report it.