Antelope Valley California Poppy Reserve, State natural reserve in Los Angeles County, United States.

The Antelope Valley California Poppy Reserve is a state-protected reserve in the rural west of Antelope Valley, northern Los Angeles County, 15 miles (24 km) west of Lancaster, at 2,600 to 3,000 feet (790 to 910 m) in the Mojave Desert climate zone. In bloom, dense orange California poppies cover the ground and lower slopes of a large, rounded, mostly barren brown hill, with a band of yellow flowers across the middle distance and patches of green and grayish low vegetation among the orange.

Sheep grazed the buttes of the western Antelope Valley until the early 1970s, and pronghorn did so before them until the railroad arrived in 1876. The reserve was later established through the efforts of conservationist Jane S. Pinheiro, after whom its interpretive center is named. Since 1994, controlled fires have been used to regulate dead brush, exotic species and litter.

The reserve's name comes from the pronghorn that grazed here until the railroad arrived in 1876. The interpretive center honors Jane S. Pinheiro, a conservationist and community activist instrumental in creating the reserve. Visitors come in spring to see the orange poppies and other wildflowers such as owl's clover, lupine, goldfields, cream cups and coreopsis.

The reserve offers 11 kilometers (7 miles) of marked trails in different lengths suitable for different fitness levels. Peak blooms happen from late February through early May, with exact intensity depending on winter rain.

The reserve forbids any artificial watering or flower picking to maintain natural bloom cycles. These rules ensure the poppy fields depend entirely on winter rainfall, sometimes producing sparse displays and other years covering the hills completely.