Usa

Here's an ideal itinerary for 16 days in the USA that meets your constraints:

Day 1: Arrive in San Francisco, California. Spend the day exploring the city and its famous landmarks like the Golden Gate Bridge and Fisherman's Wharf.

Day 2: Drive to Yosemite National Park and spend the day hiking and exploring the park's stunning natural beauty.

Day 3: Continue exploring Yosemite National Park with a full day of hiking and sightseeing.

Day 4: Drive to Lake Tahoe and spend the day relaxing by the lake or hiking in the surrounding mountains.

Day 5: Head to Reno, Nevada for a day of gambling and entertainment.

Day 6: Drive to Zion National Park in Utah and spend the day hiking and exploring the park's stunning red rock formations.

Day 7: Continue exploring Zion National Park with a full day of hiking and sightseeing.

Day 8: Drive to Bryce Canyon National Park and spend the day hiking and exploring the park's unique hoodoo rock formations.

Day 9: Continue exploring Bryce Canyon National Park with a full day of hiking and sightseeing.

Day 10: Drive to Moab, Utah and spend the day hiking in Arches National Park.

Day 11: Continue exploring Moab with a full day of hiking and sightseeing in Canyonlands National Park.

Day 12: Drive to Grand Canyon National Park and spend the day hiking and exploring the park's stunning natural beauty.

Day 13: Continue exploring Grand Canyon National Park with a full day of hiking and sightseeing.

Day 14: Drive to Joshua Tree National Park and spend the day hiking and exploring the park's unique desert landscape.

Day 15: Continue exploring Joshua Tree National Park with a full day of hiking and sightseeing.

Day 16: Drive back to San Francisco and spend the day relaxing and reflecting on your amazing 16-day adventure.

This itinerary includes plenty of hiking and outdoor activities, as well as opportunities to relax and enjoy the natural beauty of the West Coast. Camping is also an option in many of these parks, which can help keep costs down. Overall, this itinerary offers a great mix of adventure, relaxation, and affordability.