Tract guide · Silverthorne, Simi Valley

Silverthorne II

Silverthorne II is the eastern phase of Silverthorne: 129 single-family homes on Tract 4998-4, recorded June 24, 1998, for owner Rancho Cortijo 250, LLC. It covers the eastern stretch of Evening Sky Drive along with Mustang Drive, Cherokee Circle, Painted Pony Circle, Red Bluff Court, Spiritlake Court, Nightfall Place and a few shorter courts.

Well documented: confirmed in official or multiple independent records.
Updated October 16, 2026 · Corrections: send a correction

At a glance

Silverthorne II quick facts

Also called	Tract 4998-4
Neighborhood	Silverthorne, Simi Valley
Builder	Rancho Cortijo 250, LLC (owner of record on the map)
Built	Late 1990s to early 2000s (map recorded June 1998)
Homes	129
Home types	Single-family detached homes, mostly about 3,000 to 4,300 sq ft
Lot sizes	Mostly about 0.23 to 0.58 acre; median about 0.28 acre
Streets	Evening Sky Drive (east end), Mustang Drive, Cherokee Circle, Painted Pony Circle, Red Bluff Court, Spiritlake Court, Nightfall Place, Wolf Creek Court, Sunset Place, Little Feather Avenue, Whitetail Avenue
Tract map	Ventura County Tract 4998, Unit 4: recorded 1998 (134 MR 90), about 106 acres
Gates	Not gated
HOA	Silverthorne II Owners Association — Listed as a 129-unit association managed by GM Management. Registered with the state in 1999.

Highlighted: recorded Tract 4998, Unit 4 (county GIS). Other outlines are neighboring tracts in Silverthorne.

About

About Silverthorne II

Silverthorne II Owners Association, listed as managed by GM Management, governs the phase. The Las Llajas Canyon and North Ridge trailheads are on its section of Evening Sky Drive. Assessor records show most houses between about 3,000 and 4,300 square feet, with a few larger. Lots are usually a little over a quarter acre.

Schools

Schools for Silverthorne II

School attendance areas

Simi Valley Unified School District
On SVUSD's attendance-boundary map (elementary map revised December 2023), this tract's recorded outline falls in:

Elementary: the tract's outline spans Big Springs Elementary School and White Oak Elementary School, so it depends on the address
Middle: the tract's outline spans Valley View Middle School and an unmapped piece, so it depends on the address
High: Simi Valley High School

These come from the district's own data, not from this site. Assignment goes by address, and districts change boundaries and run choice and transfer programs. Confirm with School Boundary Maps, or check an address here.

Part of

Silverthorne, Simi Valley

Silverthorne is a hillside neighborhood of about 250 single-family homes at the top of Yosemite Avenue in northeast Simi Valley, laid out along Evening Sky Drive. Its four tract maps were filed as Tract 4998 by landowner Rancho Cortijo 250, LLC and recorded in 1997 and 1998. The houses went up in two phases in the late 1990s and early 2000s.

The Silverthorne guide: HOA, schools nearby, services →