BEST BET Saturday Hike 7 3/4 miles on Prince George's County's Northwest Branch Trail of the Anacostia Tributary Trail with the Appalachian Mountain Club. Explore a secluded stream valley in urban setting. Step off at 10 a.m. Details: amc-dc.org (click: "Activity List") or 410-263-1844.
CHILDREN Tuesday Discover the wild world of wolves in an interactive program that will teach children how to howl like a wolf and why wolves howl, 2 p.m., at the Patuxent Research Refuge, Laurel. For ages 5-7. The visitor center is on Powder Mill Road, between the Baltimore- Washington Parkway and Route 197. To register: 301-497-5763.
HIKING Next Sunday Learn to identify seed heads and discover the winter role of trees, weeds and seeds on a guided walk, 9 a.m., at the Patuxent Research Refuge North Tract, Laurel. All ages. Field guide, water and magnifying lens are recommended. The North Tract is on Route 198, between the Baltimore-Washington Parkway and Route 32.
WORKSHOPS Saturday Join the Westminster Astronomy Club for an evening of stargazing at Soldiers Delight Natural Environment Area, 8 p.m.-10 p.m. Explore myths, legends and battles of the winter skies. December highlight: the Virgo galaxy cluster. Rain or shine. Telescopes provided. Free. Meet at the visitor center, 5100 Deer Park Road, Owings Mills. To register: 410-549-3026.