HIKE WITH HOUNDS, MAY 11
Santa Rosa: Take a 5-mile hike with your well-behaved, nonaggressive dog from 5:30 to 7:30 p.m. today at Taylor Mountain Regional Park, 3820 Petaluma Hill Road. Bring water for you and your canine and waste bags. Leash length should be no longer than 6 feet. Meet at the Kawana Springs trail head. Call 707-565-3080 for information, or visit parks.sonomacounty.ca.gov.
MAKE BOUQUETS, MAY 13 and 14
Sebastopol: Make a Mother’s Day bouquet with invasive wildflower species from 2 to 5 p.m. Saturday and Sunday, at Ragle Ranch Regional Park, 500 Ragle Road. Bring water, gloves, garden clippers and a hat. $10, plus $7 parking for nonregional parks members. Register at sonomacountyparks.org. Call 707-565-3080 for information.
RIVER PADDLE, MAY 13
Petaluma: Join Friends of the Petaluma River and LandPaths on a 3-mile round-trip paddle on the Petaluma River from 1 to 4 p.m. Saturday. Begin and end at Steamer Landing Park, 6 Copeland Ave. Recommended for paddlers with some experience. Bring your paddle watercraft. A limited number of boats are available at the park. Bring water and snacks. Register at LandPaths.org. Call 707-544-7284 after 11 a.m. to confirm the event; heavy rain cancels the event.
FAMILY HIKE, MAY 13
Glen Ellen: Bring the kids to a free, easy 2-mile guided hike from 10 a.m. to noon Saturday at Beauty Ranch in Jack London State Historic Park, 2400 London Ranch Road. Meet in the ranch parking lot. $10 vehicle fee, $5 for walk-in or bicycle. Call 707-938-5216 for information.
FULL MOON CAMPFIRE, MAY 13
Santa Rosa: Take a twilight walk, make s’mores by a campfire and hear folktales about the moon from 7:30 to 10 p.m. Saturday, at Spring Lake Regional Park, 393 Violetti Road. Call 707-565-7888 for information.
OPEN HOUSE, PLANT SALE, MAY 13
Santa Rosa: Celebrate spring from 10 a.m. to 4 p.m. Saturday at the Laguna de Santa Rosa Environmental Center, 900 Sanford Road. Children’s Playscape and activities for all ages. Donations gladly accepted. Visit lagunafoundation.org.
HALF-MARATHON, May 21
Windsor: Registration is open for the Windsor Green half-marathon, 10K and 5K races, which start between 7:30 and 7:50 a.m. on the Town Green. All three courses are 100 percent paved, and there is a 3-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 RACES, Aug. 6
Santa Rosa: The 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. It 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.
HALF-MARATHON, 5K, Oct. 8
Healdsburg: The half-marathon starts at 7:30 a.m. and the 5K race at 8:15 a.m. on Oct. 8. Races start and finish 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 about the marathons is available online at healdsburgrunningcompany.com.