Where? : St. Joseph's Hill Preserve is relatively small park located just south of Los Gatos hills viewing Lexington Reservoir.
Main parking lot is located at the Lexington Reservoir Alma Bridge road.
What? : Open hill landscape with nice view both to Lexington Reservoir and to South Bay
Length? : Overall this can be around 3-4 miles hike, moderate difficulty.
Jones Trail start with steep climb up the hill. After 0.5 mile you will turn right into the main park section, if you keep going straight on Jones Trail it will take you to Los Gatos gate.
keep going up (right) on Novitiate Trail, after 0.2 mile turn right into Manzanita Trail.
This trail keeps climbing on the hill side with lake viewing.
At St. Joseph's hilltop viewing point you will reach the end of your climb, enjoy the view both west and into the south bay.
You can have few shortcuts on the way up with connectors trails that will take you to Novitiate Trail. No matter what you chose you will need to take Novitiate Trail back down to Jones Trail and from there back to the parking lot.
The overall hike is 3 miles, but it feels longer because the first half of it is constant uphill.
You can combine this park visit with a much longer loop hike over Los Gatos Creek Trail.
Lexington Reservoir visit: you can find many places you can hike on the reservoir waterfront.
My thoughts: not a must visit park, nice view on the lake and the south valley but can be crowded, no shade and can be hot during summer days.