3 outdoor events coming up in Marin

• The 15th annual Point Reyes Birding & Nature Festival features more than 50 guided field events from April 19 to 21 in Marin and Sonoma counties. Prices vary. For more information, visit pointreyesbirdingfestival.org.

• The Fairfax Open Space Committee and Fairfax Parks and Recreation host a “BioBlitz” walk with an emphasis on local biodiversity from 10 a.m. to noon April 27 at the Wall Property at the end of Marinda Drive in Fairfax. This event is free and open to the public. For more information, visit townoffairfax.org or email Susan Pascal Beran at pascalberandesign@yahoo.com.

• The San Francisco Amateur Astronomers and Friends of Mt. Tam host a “star party” with telescopes available from 7:30 to 10:30 p.m. May 11 at the Rock Spring Trailhead parking area on West Ridgecrest Boulevard in Mount Tamalpais State Park. This event is free with RSVP. For more information, visit eventbrite.com.