MESA VERDE NATIONAL PARK, Colo. — Oh, how I love parks. National parks, state parks, municipal parks. You name ’em. I love ’em.

We’ve spent a good bit of travel time visiting and staying at public parks. They’re quite friendly to us recreational vehicle users. What’s more, the National Park Service has this wonderful perk it extends to us older folks. It’s called a “Senior Pass.” It gets us into national parks for free — for the rest of our lives.

Texas’s state parks system also allows us free entry, but it’s not a lifetime pass. We have to renew it annually. It’s worth it for us, given that (a) state park overnight RV lodging is cheap and (b) the state parks in Texas generally are places of beauty.

We ventured to Mesa Verde National Park, which is about 40 miles west of Durango. It features 1,000-year-old — and older — cliff dwellings carved out of canyon walls high up in the mountains. It’s about a 20-mile drive from the park entrance to where one can see the dwellings. It’s a winding, highly scenic excursion along the way.

If I had one gripe about our national parks, it’s that they aren’t exactly pet friendly. We found this out on another trip to Guadalupe Mountains National Park in Texas and at Carlsbad Caverns National Park in New Mexico.

We had to sneak Toby the Puppy along with us to Mesa Verde’s exhibits. He wasn’t allowed to walk along any trails, but since we didn’t see “trails” as I understand the meaning of the word, we took him with us along paved walkways toward the exhibits; then we would pick up him and pack him through some of the dwelling exhibits.

Shhh! Don’t rat me out … please.

Our travels are going to take us to many more of these federal parks. I believe we’ve been to 17 national parks already in our 46 years of life together. One of my unofficial bucket-list objectives is to see all of them before I’m no longer able to travel long distances.

So … the adventure continues.