RACE REGISTRATION, MARCH 9

Santa Rosa: Today is the deadline to register online for the Empire Runners Club’s Ilsanjo Classic 10-mile and Neo-Classic 4-mile race, 8:45 a.m. Sunday at Howarth Park in Santa Rosa. Race day entry fee is $20. Visit empirerunners.org for information.

TRAILS FOR TOTS, MARCH 10

Sonoma: Kids 3 and 4 years old and their parents and guardians read stories, sing songs, make nature-themed crafts and take a short walk, 10 to 11:30 a.m. Friday at Maxwell Farms Regional Park, 100 Verano Ave. Parking $7. Call 707-565-7888.

BILL AND DAVE’S HIKE, MARCH 11

Santa Rosa: Bill Chalk and Dave Meyers lead a strenuous 4-5-mile loop hike at the Lawson extension of Hood Mountain Regional Park and Open Space Preserve, 1450 Pythian Road, 10 a.m. to 2 p.m. Saturday. Parking $7. Call 707-539-8847 for details.

BIRDS OF PREY, MARCH 11

Santa Rosa: Larry Broderick leads a birds of prey winter spotting and identification walk at the Laguna de Santa Rosa, 900 Sanford Road, 10 a.m. to 2 p.m. Saturday. Meet at Heron Hall before carpooling to one of two sites. $30, pre-registration required. Moderate or heavy rain will cancel the event until Sunday. Visit lagunadesantarosa.org for information.

SPRING HIKE, MARCH 12

Glen Ellen: Hike into early spring 10 a.m. to 1 p.m. at Jack London State Historic Park, 2400 London Ranch Road. $15 admission. The 3-mile, moderate-paced hike is limited to 20 participants. Meet in the ranch parking lot. Visit jacklondonpark.com. Call 707-938-5216 for information

James Lanaras