the home straight
noun /ðə ˌhəʊm ˈstreɪt/
  /ðə ˌhəʊm ˈstreɪt/
(especially British English) (also the home stretch 
 [singular] /ðə ˌhəʊm ˈstretʃ/
  /ðə ˌhəʊm ˈstretʃ/
 especially in North American English)- the last part of a race- He dominated the race in the home straight.
 
- the last part of an activity, etc. when it is nearly completed- We're in the home straight now—14 cities down, one to go.