Get ahold of the Jerry Schad hiking book – Afoot and Afield in San Diego County. 250 hikes from Tecolote Canyon to the Laguna Mountains. Mission Trails Park in La Mesa / Santee is huge and good for both hiking and mountain biking.
There are a lot of “neighborhood canyon” coalitions that clean the inner-city canyons and host hikes – the San Diego Sierra Club website lists those. Friends of Tierrasanta Canyons is quite active and just carved out a new nature trail overlooking Admiral Baker Golf Course. Getting involved takes some effort but it is worth it.
Summer concerts in Balboa Park every Tues, Wed and Thurs, and concerts at the Organ Pavilion on Sundays…. rotating free museums on Tuesdays…
