Anniversary Narrows Slot Canyon is located within the Lake Mead Scenic Byway area, just outside of Las Vegas, Nevada. Hiking this trail is best November through March when the temperatures are much cooler. There is zero shade and water, and there's no "official trail". Despite this, hiking the Anniversary Narrows Slot Canyon is perfect for the whole family, dogs included (off leash). Small children and dogs will need help over a few obstacles, but there is nothing technical required. Because of it's short mileage, this slot canyon is perfect combined with hiking around Red Rocks Canyon National Conservation Area (such as Turtlehead Peak) or even Valley of Fire State Park.
Turtlehead Peak (6, 323 ft) is located in Red Rock Canyon National Conservation Area, and one of the most popular hikes in the park. To reach the trailhead (TH) you must have a timed entry reservation for Red Rocks (get that here), and start hiking early to beat to people all the people and weather. Turtlehead Peak offers amazing views of the entire area, and on a clear day you can even see the Las Vegas Strip!
Grove Creek Canyon is located to the east of Pleasant Grove, Utah. It leads you through a somewhat narrow canyon, that eventually connects with the Great Western Trail. Along the way you'll have an amazing view of South Mt. Timpanogos, and pass two waterfalls - the first which is inaccessible, and the 2nd you could probably find a way down to yet wouldn't be easy.
Battle Creek Falls is another family friendly, dog friendly, and child friendly waterfall hikes that is enjoyable as more of a stroll rather than a "hike". It's short distance and elevation gain make this hike do-able for family visiting from out of town that want to see something pretty, yet not have to work hard to get there.
Lexington Arch is located within Great Basin National Park, yet very few people make the trek to it due to it not being in the main area of the N.P. In fact, access to the trailhead was closed for a long time due to the "Strawberry Fire" of 2016. Then a flash flood ripped up the road leading to the original TH. Now, hikers have to add an additional mile of hiking before reaching the official TH.
Icebox Canyon is a 5 mile loop hike that starts at Wheeler Creek, cuts through Icebox Canyon itself, the Art Nord meadow near Snowbasin, then back through Wheeler Creek.
This is a popular trail for mountain bikers, families, dogs playing in the stream, and those looking to take visitors on a nice, scenic, easy hike.
Desert Peak (7,005 ft) is located in the Newfoundland Mountains in the Great Salt Lake, and is the highest point in the range. Getting to the unofficial trailhead takes quite a bit of effort, and it is very tricky timing it at just the right time of year. Because it's located in the middle of the Salt Flats, any recent precipitation will leave the dirt roads completely muddy and rutted out. There is zero cell service, so you don't want to risk getting stuck.
Meridian Peak (5,978ft) is small peak in North Salt Lake along the Bonneville Shoreline Trail and just north of Ensign Peak. The main trail also takes you past Matt's Arch (aka "Industrial Arch") - a tiny natural arch made of limestone. There are trails all over, making this a "choose your own route" hike. I decided to turn my route into a 5 mile loop, and since there was barely any snow on the trail the day I hiked it, it was a perfect Winter hike. Safe from avalanches, only a few bikers, a handful of other hikers, and not hot like it normally is in summer.
Paul Bunyan's Woodpile is an interesting geological feature in Central Utah, that looks like a "woodpile" of logs left behind by the giant lumberjack of American & Canadian Folklore. Really the woodpile is a cluster of lava rocks formed about 30 million years ago; the logs were then formed into orderly columns.