Third Winter Wonder Run 6K, 10 a.m. Institute Woods trails, at Princeton Friends School, 470 Quaker Rd., Princeton. 8:45 a.m. Limited to 150. Walkers are welcome. Anyone expecting to take longer than 50 minutes should arrive by 9:30 a.m. for possible separate early start. Fee: including T-shirt, $35. Discount for no-shirt option. Day-of registration is credit card only, no cash, $35, not including T-shirt. princetonac.org
3d Annual 5k Chilly Trail Run, 11 a.m., at Haverford Reserve. Fee: Adults $30, 17-and-under $15. Walk-up registration opens at 10 (at Pavillion by playground). 9000 Parkview Dr., Haverford. Tara Kaufmann at firstname.lastname@example.org or haverfordtownship.org
Elves for the Shelves 5K, 1-Mile Fun Run, 9 a.m. Benefits Radnor Memorial Library. Registration: 8:15. Radnor Memorial Library, 114 W. Wayne Ave., Radnor. Precedes Wayne Hotel's Old Fashioned Christmas Santa Parade. 610-687-1124.
Race for the Hungry 5K, 9 a.m., Burlington Twp. Fee: $25. Green Acres Park, Old York Rd. Donations of non-perishable foods requested for the Burlington Township Food Pantry. $5 fun run for the kids at 10.
Camden City Street Run 5K, 10 a.m., Camden. Fee: $30 post. Susquehanna Bank Center, 1 Harbour Blvd.
Gregory Delassio 5K, 8 a.m. Cherry Hill. 402 N. Kings Highway (Chris Our Light Catholic Church).
3d Annual Abominable Slowman 5K, 9 a.m., Wilson Farm Park, 500 Lee Rd, Wayne. Open Hearts Open Homes orphan care.
Ugly Sweater Run 5K, 8 a.m. at Fairmount Park, 4231 Avenue of the Republic. email@example.com. Benefits Save the Children's Make the World Better With a Sweater campaign to give children living in poverty in America and around the world a brighter future.
Third Annual Freezer 5K Run & Family Fun Walk, 9:45 a.m., along the power-line trail in Horsham. Simmons Elementary School, 411 Babylon Rd., Horsham. Fee: $30, Freezer5K.com.
Northeast RoadRunners and AOH Div 61 "Christmas is for Giving 5k, 10 a.m. Little Cities (Rhawn Street entrance) PennyPack Park bike path. Fee: unwrapped gift. Info: firstname.lastname@example.org
Boxing Day 5K, 10 a.m., Medford Lakes. No frills, No entry fee, Pineland Striders running club. 79 Tecumseh Trail. sjtiming.com
Dashing Thru The Sand 5K, 9 a.m. On the beach at 3001 Avalon Ave., Avalon. Fee: $25 plus $2.50 sign-up. sjtiming.com
New Year's Eve Midnight Run 5K, McFadden's at the Ball Park. Midnight. Fee: $60. Includes open bar and food from 9 to closing. runbucks.com
Williamstown Badgers Hangover 5K, noon, $10 Adults, 12-under free. "No frills" event with chip timing. At the Williamstown Middle School parking lot, 561 Clayton Rd.
19154 5K, 9:15 a.m. (Kids Fun Run at 9) Fee: $25 before Jan 23; $30 thereafter. 191545k.com, email@example.com or 215-637-3525. St. Anselm Church, 12670 Dunks Ferry Rd., Philadelphia.
Chilly Willy 5K, 1 p.m. Medford. Fee: $20 pre, $25 post. Camp Okanickon, Medford.