K M.
Yelp
This place rocks! No pun intended!
This is a pretty small area and only slightly out-of-the-way but totally worth going to! On the National Parks totem pole, the National Reserve is pretty low. It's federal land but administered by the Idaho state parks authorities instead of NPS rangers. When we started planning the trip we weren't really sure if it would be a good stop or not but decided to check it out. And boy were we glad we did!
First and foremost, this is THE PLACE to go if you are into rock climbing. From the NPS website: "A few granite pinnacles and monoliths are in excess of sixty stories tall and 2.5 billion years old. The smooth granite faces offer exceptional rock climbing. Today, over 500 climbing routes have been identified." Also if you like going to to the lesser-traveled parks, this place is totally for you because it's not crowded at all! Getting there is mostly by paved roads if you come in from the Almo side (only the road thru the park is dirt, but if you go in or out on the west side towards Oakley you'll be on gravel for a lot longer, most of the way to Oakley.)
I recommend coming in from Almo so you can stop at the visitors center first. The VC is in a little old house right on Elba-Almo Road. The rangers there will give you some good background into the geology of the place and what to see and do. They will also give you a map showing all of the campsites (they are scattered throughout rather than lumped into one campground) with a list on the back giving you the details of each site (letter grade for quality of shade, distance to the campsite if it's not right next to the parking area, if it has a slightly-softer-than-the-hard-ground gravel tent pad, and any special features.) Also outside the VC they have some old wagons on display because emigrants on the California Trail passed right through here.
Next drive into the park. Stop at the red-sided Rock City grocery/deli just south of the VC for sandwiches and cold beer. Then make the left turn to go into the park. Take the right turn before you see the park entry sign and buy some firewood from the kids in the house on the corner - honor system so be nice and don't steal!!! Now turn around and continue heading into the park.
There are a couple of branches off the main park road but honestly you could explore them all in an afternoon this park is so small. Definitely stop and see the rock where the emigrants tagged with their axle grease. Then pick your campsite if you will be staying a while. We had site #36 which was AWESOME. 93 feet is really only about a 45 second walk from your car, and this site had tons of space, a tent pad, and a giant rock to climb on (if you walk around it a little you can find a pretty easy walking route to the top, no harnesses or ropes required. Views from the top during the sunset were AMAZING.) It was also a short walk to Bath Rock where the registration/pay station is located, and really close to Window Arch which is just a nice little spot to explore. It was NOT close to outhouses. If you're not comfortable peeing behind a rock, you may want to choose your campsite carefully. Or learn to squat. It's really not that bad.
As for wildlife, there's plenty to be seen as well as some livestock so watch out for the bovines as you're driving thru. To be nice I will warn you that there are some freaky beetles that came out at night when we were there (late July). They were about 3-4 times the size of a june bug, paler and almost wood-grain patterned, had really odd looking antennae and were REALLY friendly...as in fly up and land on you, hang out in your hair, etc. Other than being TOTALLY FREAKY they seemed to be harmless. I will attach a picture for reference.
Bottom line - if you are anywhere near southern Idaho or northern Nevada, this is a MUST SEE stop! Also a great stop for kids. Ours are 6, 4 and 1 and there's plenty of easy exploring for kids their age (backpack or carrier for the littlest one.)