Here in "Sin City" (Henderson, NV beside Las Vegas) we have a LOT of hiking trails built within the last 10 years. They are mostly "exurban", i.e. just bordering the city among low mountains (up to 6,000 ft.).
BUT.. in the intense Mojave Desert summer heat the trails are only walkable from sunrise to 7 AM. June, July and August. Then we go into the high Spring Mountains northwest of the valley. Drive an hour up into them, park at the trailhead around 9,000 to 10,000 ft. and hike in that thin, cool air among the huge Ponderosa pines up to the ancient low, twisted bristlecone pines at around 11,000 ft.
That is my DURING the week hiking. Summer backpacking can be in the Sierra Nevada of California or Rockies of Colorado.
Eric B.