This list is assembled from a variety of sources, so please email me if you spot any inaccuracies, have stuff to add, or can fill in names of places I vaguely mention...
Paraphrasing from Pittsburgh Post Gazette of 06-04-1995 section H-8 written by Suzanne Martinson
ELBEL'S PRODUCE FARM (814)938-5878 daily 0700-2000 except Sunday Indiana County HILL SIDE ORCHARDS 547-2693 0800-1200 & 1600-1900 Westmoreland HUFF STRABERRY FARM 865-9593 0800-2000 Mon thru Sat Prospect KISTACO FARM MARKET 478-4361 hours vary ; call first Apollo HENRY MALLISEE FARM 793-0898 0830-1200 & 1830-2030 M-F Plum 0830-1200 Sat McNULTY FARMS 452-4022 0700-Dusk daily Harmony PASKORZ FARM 265-3073 0800-2000 Mon thru Fri West Deer 0800-1700 Weekends REILLY'S SUMMER 364-8270 0800-1700 Mon thru Sat SEAT FARMS 1000-1700 Sunday Mount Nebo SCHRAMM FARM MARKET 744-7320 0500-2000 Mon & Wed Harrison City 0900-1200 Tues& Thurs 1100-1500 Sat & Sun SCHRAMM'S FARM MARKET 282-3714 0800-1500 Tues & Thurs South of Butler 1100-1500 Sat & Sun SIMMONS FARMS 941-1490 0800-1200 & 1800-2100 M,W,F McMurray 0800-1200 Sat SNYDER'S FARM 445-3116 0700-2000 Daily Chicora SOERGEL'S 935-1743 0900-1900 Mon thru Fri Wexford 0900-1700 Sat & Sun TRIPLE "B" FARMS 258-3557 0800-2000 Mon thru Fri Elizabeth exit off 51 0800-1700 Sat, 1000-1700 Sun TRAX FARMS 835-3246 0800-2000 Mon thru Sat Finleyville 0800-1800 Sun
We just went strawberry picking on Tuesday at Triple B farms in Monongahela, PA. The strawberries are wonderful. They are a beautifully deep red that I have never seen in strawberries before. They were also quite plentiful. I picked ~3 quarts (I think the smaller baskets they provide are 4 quarts) and I probably travelled less than 25 feet down the row I was picking. I only chose the very best looking berries--they were so plentiful it was easy to find plenty even with the most stringent criteria. I didn't end up with any that had white patches (or even light pink patches).
Their picking hours are M-F 8am-8pm, sat 8am-5pm and Sun 10am to 5pm. We started picking around 7pm and were almost the only ones in the field. The phone number is 258-3557.
Their strawberry festival is this weekend (Sat & Sun, the 17th and 18th). I don't know how much longer the strawberry season is expected to last, but they told us that raspberry season is expected to start 10-13 days from the day we visited (June 13th).
Directions (with help from Maggie Shumaker's post, which has expired at my site):