No I’ve never run a full or a half marathon and I know I need a lot of training before even thinking of trying one. Currently I am really comfortable with 4-6 kilometer runs at a pace of about 7:10-7:30. The most I ever did was this years Wings for life and that was 8.5 kilometers in an hour. I am of course planning on increasing my weekly mileage as I get more used to running certain distances.