4 entries match your criteria. Related Historical MarkersTo better understand the relationship, study each marker in the order shown. By Craig Baker, January 30, 2018 Remains of Well, and Markers SHOWN IN SOURCE-SPECIFIED ORDER1► California (Los Angeles County), Stevenson Ranch — 516 — First Commercial Oil Well In California — Pico #4 — Near Pico Canyon Road 4.5 miles west of Interstate 5. 2► California (Los Angeles County), Stevenson Ranch — 516-2 — Mentryville — Near Pico Canyon Road 3 miles west of Interstate 5. 3► California (Los Angeles County), Newhall — 172 — Pioneer Oil Refinery — ← 3 Miles — On Lyons Avenue east of Interstate 5, on the right when traveling east. 4► California (Los Angeles County), Newhall — 172 — Pioneer Oil Refinery — Near Pine Street 0.2 miles south of Newhall Avenue, on the left when traveling south.