Forgotten headlamps end hikes early. Pick your park, the season and who's coming — the list adapts, you tick things off, and the PDF keeps working offline at the trailhead.
The park tells hikers to carry two quarts per person for a two-hour walk, and a gallon per person per day in the backcountry, where the little water that exists is too full of sediment to filter. The 10-mile Castle Trail crosses open prairie with nothing to hide under, and summer highs sit in the 90s°F.
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