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#6 on this list
Hawaii Volcanoes National Park
Hawaii
Warm escape with active volcanic landscapes.
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#7 on this list
Saguaro National Park
Arizona
Sunny, mild desert days — perfect for the valley trails.
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Specs side by side
| Spec | Hawaii Volcanoes National Park | Saguaro National Park |
|---|---|---|
| Location | Big Island, Hawaii | Southern Arizona, flanking Tucson |
| Summit Elevation | 4,000 ft (Kīlauea) / 13,678 ft (Mauna Loa) | — |
| December Temps | Highs around 68°F, lows near 50°F at summit | — |
| Entry Fee | $30 per private vehicle (valid 7 days) | — |
| Park Size | Over 335,000 acres | — |
| Operating Hours | Open 24 hours daily, year-round | — |
| Districts | — | Tucson Mountain (West), Rincon Mountain (East) |
| December Highs | — | 65°F to 72°F |
| December Lows | — | 38°F to 44°F |
| Backcountry Permits | — | Required via Recreation.gov (East only) |
| Drive-in Camping | — | None within park boundaries |
What our reviewers liked and didn't
Hawaii Volcanoes National Park
- Active volcanic features and crater overlooks accessible year-round
- Comfortable winter temperatures for extended day hiking compared to summer heat
- 24-hour park access allows stellar stargazing and nighttime crater viewing
- Dramatic biodiversity ranging from mossy cloud forests to desolate lava deserts
- Volcanic gas emissions can irritate lungs and force unexpected site closures
- High holiday crowds cause heavy parking congestion from mid to late December
- Surface lava flows are unpredictable and never guaranteed during your visit
Saguaro National Park
- Mild December temperatures eliminate extreme desert heat risks
- Extensive, exceptionally maintained trail networks across two distinct districts
- High-elevation backcountry in the Rincon Mountains offers genuine wilderness isolation
- Unmatched density of mature giant saguaro forests in the Tucson Mountain District
- No frontcountry or vehicle camping options within park boundaries
- Urban Tucson divides the park, requiring a 30- to 45-minute drive between units
- Cactus thorns and sharp caliche rock demand constant trail vigilance
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