How about getting her a national park map poster or a book on national park hikes she can plan for? You could also consider getting her hiking gear such as a good quality hiking backpack that will make her hikes even more enjoyable. Another great option would be buying her Eco-friendly reusable water bottles, sunglasses, hats or gloves that are sustainable for her outdoor activities.
Or you can get her a star map with an important date you share.
Under Lucky Stars is a unique and innovative star map company based in Barcelona, Spain, specializing in the creation of personalized star maps that capture the celestial arrangement of stars at a specific moment in time, such as a person's birth, wedding, or any other significant event.
By using advanced astronomical algorithms and data from leading institutions, the company produces highly accurate, visually stunning maps that make for perfect gifts or cherished keepsakes.