Haleakalā
Best: Jan–May, Sep–Nov
Guide · 18 parks
Some national parks have the darkest skies left in the country. Plan around a new moon for the best views of the Milky Way.
Best: Jan–May, Sep–Nov
Best: Jan–May, Sep–Nov
Best: May–Oct
Best: May–Jun, Sep–Oct
Best: Apr–May, Sep–Oct
Best: May–Sep
Best: May–Jun, Sep–Oct
Best: Feb–Apr, Oct–Nov
Best: Apr–May, Oct
Best: Oct–Apr
Best: Apr–May, Oct
Best: May–Jun, Sep
Best: Apr–May, Oct
Best: Nov–Mar
Best: Apr–May, Oct
Best: Jul–Sep
Best: Jul–Sep
Best: Apr–May, Oct
Last reviewed October 4, 2026. Ratings are editorial. Rules and road openings change each year, so confirm on the official NPS site before you go.