The Red Hills Viticultural Area is located entirely within the Clear Lake viticultural area in Lake County, California, south of Clear Lake, between Lower Lake and Kelseyville. It is bounded on the east by the ridges overlooking Excelsior Valley; on the west by foothills of Mt. Konocti which separate the proposed area from Big Valley; on the north by Anderson Marsh, the shores of Clear Lake, the higher slopes of Mt. Konocti, and the distinct community of Soda Bay.
Boundaries are found on five U.S.G.S. 7.5' series topographic maps, the Kelseyville (1959, photorevised 1975) Quadrangle, Clearlake Highlands (1958, photorevised 1975) Quadrangle, Lower Lake (1993) Quadrangle, and Whispering Pines (1958, photoinspected 1975) Quadrangle.
The beginning point is the intersection of the section line between Sections 3 and 4, T12N, R7W with the shoreline of Clear Lake, on the Clearlake Highlands Quadrangle.
1. From the beginning point, follow the section line between Sections 3 and 4, T12N, R7W south to its intersection with the 1400 foot contour line.
2. Follow the 1400 foot contour line in a generally easterly and southerly direction onto the Lower Lake Quadrangle and then back onto the Clearlake Highlands Quadrangle, to its intersection with Seigler Canyon Creek, in Section 10, T12N, R7W.
3. Follow Seigler Canyon Creek westerly to its confluence with Perini Creek.
4. Follow Perini Creek southerly to its intersection with the 1800 foot contour line in Section 16, T12N, R7W.
5. Follow the 1800 foot contour line southerly, crossing from the Clearlake Highlands Quadrangle to the Whispering Pines Quadrangle, to its point of intersection with Copsey Creek.
6. Follow Copsey Creek westerly to its headwaters in Section 29, T12N, R7W.
7. Proceed westerly in a straight line to the headwaters of Bad Creek, and then due west in a straight line a short distance to Big Canyon Road.
8. Follow Big Canyon Road northerly, to its intersection with Loch Lomond Road in Section 19, T12N, R7W on the Clearlake Highlands Quadrangle.
9. Follow Loch Lomond Road westerly and then southerly to its first intersection with the 2640 foot elevation line in Section 25, T12N, R8W on the Whispering Pines Quadrangle.
10. Proceed northwesterly in a straight line to Seigler Mountain, elevation 3692.
11. Continue northwesterly along the same line to its intersection with Salmina Road in Section 23, T12N, R8W on the Clearlake Highlands Quadrangle.
12. Follow Salmina Road northerly to its intersection with Highway 175.
13. Follow Highway 175 southerly to its intersection with the section line between Sections 15 and 22, T12N, R8W, on the Clearlake Highlands Quadrangle.
14. Proceed northwesterly in a straight line to Mt. Hannah, elevation 3978.
15. Proceed southwesterly in a straight line to the point where the 3000 foot elevation line intersects the section line between Sections 16 and 17 T12N, R8W, on the Kelseyville Quadrangle.
16. Continue southwesterly along the same line to its intersection with the 2800 foot contour line which circles Boggs Lake in Section 17, T12N, R8W.
17. Follow the 2800 foot contour line northerly, westerly, and southerly, around Boggs Lake, to its intersection with Harrington Flat Road in Section 18, T12N, R8W.
18. Follow Harrington Flat Road northerly to its intersection with Bottle Rock Road.
19. Follow Bottle Rock Road northerly to its intersection with Cole Creek Road in Section 25, T13N, R9W.
20. Follow Cole Creek Road easterly to its intersection with Hwy. 29/175, and then continue in a northwesterly direction following an unnamed unimproved road to its intersection with Wilkinson Road (which runs along the western boundary line of Section 24, T13N, R9W).
21. Follow Wilkinson Road northerly to its intersection with the 1600 foot elevation line.
22. Proceed 1.4 miles straight east to the intersection of an unnamed unimproved road and an unnamed peak 2493 feet in height in Section 19, T13N, R8W.
23. Follow that unnamed road easterly and northerly to its intersection with the 2600 foot contour line in Section 19, T13N, R8W.
24. Follow the 2600 foot contour line generally easterly 2.3 miles to its intersection with an unnamed stream near the section line between Sections 20 and 21, T13N, R8W.
25. Proceed easterly in a straight line to the intersection of Konocti Bay Road and Soda Bay Road in Section 22, T13N, R8W, on the Clearlake Highlands Quadrangle.
26. Proceed due east to the shore of Clear Lake.
27. Proceed southeasterly along the shoreline of Clear Lake to the point of beginning.