You may want to beat the heat and head up to Mt. Lemmon this 4th of July weekend. If this is the case, you can check out Rose Canyon Lake Trail.
The seven acre spot has a nice and easy trail that is about one mile in length. This hike is great for families this holiday weekend.
This is also a popular spot for day use and overnight camping. Plus, you may see plenty of wildlife from birds to fish.
As a bonus, Mt. Lemmon is about 20 degrees cooler than Tucson.
This trail is rated easy in skill level.
A trail map and directions can be found here.