Started Marathon training in December that year and finished a marathon the following April
Just done v similar after a long, long layoff - first tentative treadmill jogs in Dec, couple of maras in March. Wee bit of injury, but intend to be back into ultra distances Apr/May.
A few years back but similar...
September: 2 miles
October: 5k
December: 10k
March: 15k
April: HM (solo, just extended my commute)
Started Marathon training in December that year and finished a marathon the following April.