Doug B.
Yelp
I have lived in the valley for a long time, but I don't live really close to Camelback Mountain. I've climbed it a few times, usually from the Cholla Trail to the summit as an out and back hike. I have gone up Cholla and down the Echo canyon route once as part of a big loop, running back to my car on the sidewalk/street. I don't usually try to do it in the summer since I live here and I know what that means.
This year was the first time that I parked at Echo Canyon and went out and back via that route. It is definitely more challenging going up Echo than Cholla. Some people who I passed struggling up Echo asked me at the top if I thought going down via Cholla would be easier. Absolutely it is!
I also suggest that if you are carrying a child, or think that you will end up carrying a tired child, make plans to use the Cholla trail.
On a clear day, the 360-degree views of the valley are fantastic and the climb via either way is worth it. Anyone who says this is "easy" probably needs to have their scale recalibrated. Don't believe those people. I may be on the older side, but I am out on trails around the valley all the time and there are so many other trails that fall into the "easy" bucket.
The usual caveats apply: make sure you plan ahead: carry enough water, check the weather, make sure you have sunscreen. I'd also recommend ensuring that you have both hands free if you want to use Echo Canyon. Even with the rails in some spots, it is easy to slip and a fall could result in a bad day for you or anyone you collide with on the way down. Carry your water on a belt or in a pack. I saw several people wearing gloves -- not for the cold -- which could be a good idea, depending on how your balance is. If I were trying to go fast, I'd probably wear gloves.
I'd also recommend a snack, especially for the kids. This hike is not long distance-wise, but you will exert yourself unless you can float or fly. My trip to the summit and back via Echo was 3.7 km (~2.3 miles), though the elevation gain was 410 m (~1345 ft). There are some seriously steep sections and there are not well-defined "steps" or "stairs" in most places.
I am not complaining, but, based on what I have heard and seen in descriptions of this place, I think it is worth setting expectations. The Cholla Trail has more stair-like formations than Echo.
Taking out the time I spent enjoying the views, the round trip was about an hour. I wasn't trying to beat the clock, but I also did not stop to take a break except at the top. I had two free hands, plenty of water and the weather was a perfect mid-70s day.
If it is your first time coming to Camelback Mountain, I'd suggest the Cholla Trail route, but if you want more of a challenge, Echo Canyon is the way to go. On the other hand, I think parking is easier on the Echo Canyon end, unless something has changed significantly since the last time I was here in 2019 or so.