This was a fun, refreshing, and straight-forward hike with easy logistics. We were on maintained paths the whole time, so the walking was easy. This was our third consecutive year of severe drought (~50% of normal rainfall), so the wildflower display was a bit subdued, but the oak leaves were flushing out and the landscape was beautiful.
The route passes through two urban areas (Walnut Creek and Livermore). Rather than being annoyed by that interruption, I found it fun to have access to restaurants and grocery stores; the urban interludes provided diversity that I really enjoyed.
We have been hiking extensively in the Diablo Range for about 40 years, and I continue to love the landscape.