Book Sale. To be held by Latham-Colonie Columbiettes. We welcome your book donations beginning Saturday July 24th. Sale starts at 9 a.m. to 3 p.m. at 328 Troy Schenectady Road, Latham, 12110

Bullfrog Bonanza. Explore the lake edge and shady spots. Wear clothes and shoes you’re okay getting wet in. Kid and teen friendly. Register 518-872-0800. 4 p.m. at New York State Thatcher Park.

Corn Festival. Middleburgh Rotary’s First Annual Corn Festival. July 23, 5 to 8:30 p.m., July 24, 9 a.m. to 3 p.m., and July 25, 11 a.m. to 4 p.m.. Vendors, food, corn contests, classic car show, and more. facebook.com/middleburghrotaryclub

Indian Ladder Fossils. . Explore the ins and outs of fossil hunting. Fossils found cannot be taken home. Trail is moderately rugged. Register 518-872-0800. 9:30 a.m at VC parking lot.

Rummage Sale.  Many items to choose from. Also a bake sale + The Cookie House, breakfast and lunch also available. 9 a.m. to 2 p.m.  at the Berne Reformed Church, 1664 Helderberg Trail, Berne, 12023.

Historic Marker Dedication. The Central Bridge Civic Association will dedicate two historic markers. 3 p.m. at  D.W. Jenkins home & the Albany & Susquehanna RR, then 4 pm at the Monument. More info: 518-868-5091

Albany Job Fair. People looking for a job can come and find one. 9 a.m. at Holiday Inn Express Hotel & Suites Latham 400 Old Loudon Road, Latham, 12110

Day at the Track. Network with members of the Colonie, Bethlehem, and Guilderland Chambers of Commerce while enjoying a day at the races and the amenities of The Rail at the 1863 Club. Cost: $175, register at https://tinyurl.com/DayAtTheTrack or contact 518-456-6611 or

MOPCO Performance. Join us at the beautiful Brouwer House gardens for a special program with Schenectady’s favorite (and only) improv comedy troupe- the Mopco! Pre-registration required at https://tinyurl.com/SCHSPrograms. 6 p.m. at Brouwer House Creative, 14 N Church St, Schenectady, 12305

Nature Festival. 20th Anniversary of Emma Treadwell Thacher Nature Center. 10 a.m. at Emma Treadwell Thacher Nature Center, 87 Nature Center Way, Voorheesville, 12186. 518-872-0800.