In the current edition of Mountain Flyer, I have an article about mountain biking from up high in the pine forest above Palm Springs down to the desert. Other trails are featured, along with a perspective on seeing peninsular big horn sheep while riding, a first for me.
If you time it right (winter is best), you’ll be in warm sunshine while seeing snowcapped mountains in the distance. Check for recent rains during that season, as it packs down the sand.
You can find Mountain Flyer at bike shops, Barnes & Noble, and/or go to their website: https://www.mountainflyermagazine.com/