Getting to quiet nature spots without a car

Hey all! does anyone have suggestions on how to get to any nature trails around ottawa? I absolutely love Gatineau park and the greenbelt trails but dont know how to get to the trails without a car. Are there any busses that go close to the greenbelt trails or Gatineau? or does anyone have experience trying to uber/taxi to and from trails? Or even hidden nature spots closer to central Ottawa. Thanks!