• Lassen Peak from Hat Creek

    Lassen Volcanic

    National Park California

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  • Park Highway Temporarily Closed to Through Traffic

    Lassen National Park Highway is temporarily closed at the Kohm Yah-mah-nee Visitor Center (1 mile from the SW entrance) and at the Summit Lake Ranger Station (13 miles from the northwest entrance) due to winter storm conditions. More »


Mules ear bloom below Mt. Diller
Mules ear bloom beneath Mt. Diller
NPS Photo

Lassen Volcanic offers spectacular opportunities for wildflower viewing during the summer months. View photos of wildflowers in the park in our wildflowers photo gallery, download a copy of our wildflower guide (463 KB, pdf) featuring some of the most commonly sighted wildflowers, or download a copy of the extensive park flora list (175 KB, pdf).

Blooming times vary each year and are greatly affected by the winter's snowpack. Blooming time also varies with each wildflower species. For example, mountain mules ear, snow plant, and western wallflower bloom earlier in the season, while California corn lily and silverleaf lupine tend to bloom later. Below are some rough estimates for wildflower appearance:

Park Area Elevation Range Approximate Season
Warner Valley 5,600 - 6,000' late-May through early July
Manzanita Lake 5,900 - 6,500' late-May through early July
Butte Lake 6,000 - 7,000 June through July
Southwest 6,000 - 7,500' June through July
Summit Lake 6,500 - 7,500' Late-June through early-August
Juniper Lake 6,800 - 8,000' Late-June through early-August
Lassen Peak 7,500 - 8,000' Late-July through September


Did You Know?

brokeoff mountain set against a deep blue sky

Brokeoff Mountain, seen here in Lassen Volcanic National Park, was once part of a much larger composite volcano, called Brokeoff Volcano, that towered 1000 feet above Lassen Peak and looked similar to Mount Shasta.