This is a "trail" you would definitely want to do during the spring or winter IMO. Everything is green, the skies are crisp blue early in the morning and all the mountains in the distance are capped with snow. Would not recommend during summer, unless you just enjoy getting burnt and dusty as there are no trees for shade (that I have ever found), but it is nice exercise away from the city I will admit.
Rebeca G. on Hart Park Trail
Easy hike, nice view, especially now that everything is green because of the rain from last months
Sharktooth Hill is absolutely private property. You may not be there without the owner's permission. If you want to go, you may contact Buena Vista Natural History Museum in downtown Bakersfield, CA. They offer special archeological digs to Sharktooth Hill. There are many Mako teeth found, and even the occasional Megalodon tooth. The admission price is expensive, but you will definitely find teeth, and go with experts. You may look up Sharktooth Hill on google search, and find a documentary on it.
Hart Park in Bakersfield has various trails. My very favorite is one I have been taking my now eight year old grandson to since he has been one year old. It follows the Kern river. Because of flooding over the past eight years, the trail has changed over time. It has been a great way to teach my grandson about geology, environment, and science. The trail is used by a lot of people, and sad to say, they are incredibly thoughtless, throwing their trash everywhere, (even into the river itself-INFURIATING!!), and not picking up after their dogs. I love this trail because there are wild gourds, wild black raspberries, egrets, rabbits, ground squirrels, the occasional bobcat, skunks and raccoons at night, mallards on the river, and lots of wild flowers, and fallen trees. It would be perfect if it weren't Bakersfield people who were so inconsiderate.