BUTTERFLY SEARCH, MAY 6
Santa Rosa: Learn about five butterfly families during a presentation by lepidopterist Liam O’Brien then catch and release them during a moderate, slow pace 1 to 3-mile hike from 9 a.m. to 3 p.m. Saturday, at Pepperwood Preserve, 2130 Pepperwood Preserve Road. $30 for nonpreserve members, for ages 13 and older. Meet at the Dwight Center. Visit pepperwoodpreserve.org.
CASTLES AND KITES, MAY 6
Bodega Bay: Build sandcastles and fly kites from 11 a.m. to 4 p.m. Saturday at Doran Regional Park, 201 Doran Beach Road. Bring your own castle-building tools and kite or use sand toys on site or purchase a kite by a vendor. Amateurs and experts welcome, instructors available. Meet at the boardwalk. Parking, $7. Call 707-565-3955 for information.
WILDLIFE TRACKING, MAY 7
Bodega Bay: Kids ages 5 to 12 accompanied by an adults can learn about the tracks and homes of local wildlife during a guided hike at Doran Regional Park, 201 Doran Beach Road, from 10 a.m. to noon Sunday. Meet at the first parking lot on the left after the entry kiosk across from Cheney Creek Trail. Parking, $7. Call 707-565-3080.
RAPTORS VIEWING, MAY 7
Santa Rosa: Keep an eagle eye for migrating raptors during a naturalist-led hike from 9 a.m. to 1 p.m. Sunday at Taylor Mountain Regional Park and Open Space Preserve, 3820 Petaluma Hill Road. Bring lunch, water and binoculars, if you have them, and wear layered clothing. Parking, $7. Call 707-565-2041 for information.
JACKRABBIT DERBY, MAY 7
Santa Rosa: The Empire Runners Club’s Jackrabbit Derby and Bunny Hop at Spring Lake Regional Park starts 8 a.m. Sunday with a free 1K Bunny Hop for kids 10 and younger followed by a 3-mile Jackrabbit Derby at 8:15 a.m. Nonmember 3-mile race is $10 if you register today, same-day registration is $20. Both races start and finish in the field near the boat ramp below the Jackrabbit Picnic area. Contact firstname.lastname@example.org for information.
town green half-marathon
Windsor: Registration is open for the May 21 Windsor Green half-marathon, 10K and 5K races. Races start between 7:30 and 7:50 a.m. on the Town Green. All three courses are 100 percent paved. There is three-hour time limit for the half-marathon. The event includes a prerace expo, and the Windsor Fire Department prepares a hot breakfast. Registration for the 5K is $30 for ages 5 to 15 and $45 for 16 and older; the 10K is $40 for ages 5 to 15 and $60 for ages 16 and older; and the half-marathon is $55 for ages 8 to 15 and $90 for 16 and older.
Water to wine half-marathon
Santa Rosa: The Water to Wine half-marathon and 10K on Aug. 6 starts and finishes at Kendall Jackson Wine Estate and Gardens on Fulton Road in Santa Rosa. Both races begin at 7 a.m. The half-marathon course is 80 to 90 percent paved with two off-road sections through vineyards and hard-packed dirt roads and has a cutoff time of 3.5 hours. Registration for ages 8 and older is $90 for the half-marathon and $60 for the 10K.
Healdsburg: The half-marathon starts at 7:30 a.m. and the 5K race at 8:15 a.m. on Oct. 8. The start and finish is at Healdsburg City Hall in downtown Healdsburg. There is a prerace expo and a beer and wine Octoberfest after the race. The half-marathon has a 3.5-hour cutoff time. Registration for ages 5 and older for the 5K is $40 before Aug. 1 and $50 after Oct. 1. Registration for ages 8 and older for the half-marathon is $90 before July 1, $100 before Sept. 1, $120 after Oct. 1 and $125 at the pre-expo. Registration and information is online at healdsburgrunningcompany.com.