* Saturday: Charlotte (N.C.) Observer Marathon.
* Sunday: BRRC Frozen Finger 5-Miler, 323-RUN0.
* Jan. 11: MCRRC Winter Flower Run, 6 miles, Rockville, 8:30 a.m., (301) 353-0200.
* Jan. 12: BRRC 10-mile championship, 323-RUN0; Tri-Maryland No Frills Biathlon (3.5 run, 14.5 bike), Salisbury, 10 a.m., 882-6103.
* Marathons: Bermuda Marathon/10-K, Jan. 18-19; Shamrock Marathon, Virginia Beach, Va., March 21; London Marathon, April 12.
* News & notes: An indoor triathlon at Bare Hills Athletic Club Feb. 8 will include a 10-minute row on an Ergometer, a 10-minute cycle on an Airdyne and a mile run on a 10-lap track. Registration will be at 6 p.m. for the 7-11 p.m. event.