Deciding between Glacier and Zion? For dogs, Glacier rates D and Zion rates D. Glacier has 7 hand-verified trails (0 dog-friendly); Zion has 7 (1). Here's the full side-by-side, pulled from our own data.
| What matters | Glacier | Zion |
|---|---|---|
| Dogs (pet policy) | D Roads & campgrounds | D Roads & campgrounds |
| Trails mapped | 7 | 7 |
| Dog-friendly trails | 0 | 1 |
| Youngest kid trail | age 0+ | age 0+ |
| Timed entry / permits | Timed-entry reservation, Permit required | Lottery |
| Park shuttle | Yes | Yes |
| Heat / altitude fueling | — | Yes |
| Activities mapped | 4 | 4 |
| Weather now | 56°F · Patchy Smoke | 55°F · Mostly Clear |
DATA · NPS + NOAA + HAND-CURATION · VERIFY CLOSURES AT NPS.GOV
They tie — both grade D on our A–D pet-policy scale. Dogs are restricted to paved roads, campgrounds and parking areas — almost no trails.
They match — age-rated trails in both start at 0+.
Glacier has: permit required, timed-entry reservation. Zion has: lottery. Details and official booking links are in the table above.