ON NICK: L.L. Bean Cotton Flannel shirt ($89); Ibex Ramble wool pants ($195); Nobis Mr. Log Hauler hat ($62) and Milton scarf ($90); Filson Clip suspenders ($46). ON WYATT: Polarn O. Pyret Fleech-Lined Shell overalls ($153); his own boots. ON FIONA: Polarn O. Pyret WindFleece Bunting ($89) and Fleece Tassel hat ($23).
West of downtown, Theodore Wirth Park has snow-making capabilities, lights, and a rope tow (plus cross-country trails, a restaurant, and a snowboarding park).
In Jamaica Plain, Harvard's Arnold Arboretum has three good slopes. (Peters Hill is the longest.)
Snoqualmie Pass, about an hour from downtown, has two good options. Hike up Hyak Sno-Park's windy and treed slopes, or pay for tubes and rope-tow access at Snoqualmie Summit Tubing Center, which has 12 open, groomed lanes.
Ruby Hill Park is the city's only sanctioned sledding spot. Leadville's Dutch Henry Sledding Hill, about two hours southwest of the city, is home to the state's highest and (supposedly) fastest descent.
The South Side's long, steep, well-lit Swallow Cliff Woods Sledding Hill is your best bet.
Closer than you might think, Mount Baldy's tubing runs are just an hour east of L.A. in the San Gabriel Mountains.