Kenwood cherry blossoms and spring flowers walk, daily, self-guided 10K and 5K along the Capital Crescent Trail. Map available at Starbucks, 4611 Sangamore Rd., Bethesda. 301-946-5496.
“Ride the Riverside” fundraiser, registration is open for the June 8-9 bike ride to benefit the National Multiple Sclerosis Society. Routes are 30 miles to more than 100 miles over one or two days. Visit www.bikemsdc.org for details and registration information.
Foreign policy discussion, the nonpartisan Foreign Policy Association of local groups gathers monthly to share ideas on foreign policy of the United States. 12:30 p.m., Potomac Library, 10101 Glenolden Dr. Free. 240-777-0690.
Fulks Corner farmers’ market, local produce, baked goods and more. 1-6 p.m. Gaithersburg farmers market, Fulks Corner Ave. at Route 355, Gaithersburg. 301-258-6350 or www.gaithersburgmd.gov/markets.
“American Impressionists at Giverny,” art historian Joan Hart gives a talk on American painters of the late 19th and early 20th century, including John Singer Sargent, Theodore Robinson, Lilla Cabot Perry and others who went to Giverny. 1:15 p.m., Holiday Park Multiservice Senior Center, 3950 Ferrara Dr., Wheaton. Free. 240-777-4999.
“Murder on the Orient Express,” a screening of the 1974 classic murder mystery by Agatha Christie, starring Lauren Bacall, Albert Finney and Ingrid Bergman. For moviegoers who are hard of hearing, the film also includes English subtitles. 2:30 p.m., Aspen Hill Library, 4407 Aspen Hill Rd., Rockville. Free. 240-773-9410.
Help with homework, students from Paint Branch High School’s Honor Society help students with homework. 4 to 6 p.m. Thursdays and Tuesdays, Marilyn J. Praisner Branch Library, 14910 Old Columbia Pike, Burtonsville. Free. 240-773-9460.
Friday, May 3
60th annual Azalea Festival, azaleas, annuals, flowering shrubs, wildflowers and perennials. Plus, artwork for sale, live music, children’s area, food and more. 10 a.m.-5 p.m. Friday-Sunday, The Landon School, 6101 Wilson Lane, Bethesda. Free. 301-320-1014.
“Great Reads” used book sales, 1-5 p.m. Friday and 10 a.m.-3 p.m. Saturday. Twinbrook Library, 202 Meadow Hall Dr., Rockville. 240-777-0240.
Saturday, May 4
“Wings of Fancy,” the popular live butterfly and caterpillar exhibit is back. Open 10 a.m. to 4 p.m. daily through Sept. 22. Brookside Gardens Conservatory, 1500 Glenallan Ave., Wheaton. $6; For ages 3 to 12, $4. 301-962-1400.
Pike Central farmers market, 9 a.m.-2 p.m, 11806 Rockville Pike (between Montrose and Old Georgetown roads), Rockville. 301-775-6402.
Plant clinics, Montgomery County Master Gardeners answer questions. Take plant specimens for identifying and diagnosing problems. 10 a.m.-1 p.m. Twinbrook Library, 202 Meadow Hall Dr., Rockville. Free. 240-777-0240. Also at the Marilyn J. Praisner Library in Fairland.