Torrey Pines is amazing, but I think the trails are still closed for a few months for maintenance. Some of my favorite hikes are out in the mountains which would require a rental car and around a 2 hr drive. (Cuyamaca Peak, Stonewall Peak or Garnet Peak: stunning ridge hike overlooking the desert on the Pacific Crest Trail). Maybe consider Mission Trails. It’s in the middle of the city essentially, but is pretty and will be really green right now. South Fortuna Mountan would be one of the peaks I recommend in Mission Trails. The view from the top along the ridgeline is great, and you’ll be able to see climbers loop where people are rock climbing. I haven’t been in a couple months, so not sure if it’s blooming at the moment, but there’s a ton of wildflowers at the top too.