Dawn broke on this East County landscape last Saturday, ushering in the season of autumn at 7:49 a.m., right about the time Press columnist Ger Erickson captured this buckeye grove (elevation 970 feet) at Round Valley Regional Preserve on the southern border of Brentwood. The far background hills streaked in shadow belong to Contra Loma and Black Diamond Mines parks in Antioch. We at The Press wish you a happy – and picturesque – autumn.