What shoulder season means
Shoulder season is the transition between peak and off-peak, typically late spring and early fall for mountain parks. Crowds drop, but services and roads are mostly still running.
The upside
You get thinner crowds, easier parking, and often better light and temperatures. Fall adds color in many regions, and spring brings strong waterfalls and green landscapes.
The tradeoffs
Weather is less predictable, some high roads may open late or close early, and a few facilities run reduced hours. Always confirm current openings and conditions before you commit.
Plan with a buffer
Build flexibility into a shoulder-season trip. Have a backup plan for a closed road or a stormy day, and check official status close to your travel date.