I know that runners dont like to miss races/events, but that looks bloody swollen and bruised. I've done my ankles enough times to know what it's like. I won't mince my words, but I think you would be a fool to run or walk over 60 miles of rough inhospitable ground with an ankle that is clearly VERY injured. And anyone who suggests you should give it a go is also a fool. It's in a weakened state already and it wouldn't take much to turn it badly again (no matter how much strapping you put on it) which will put you out of action for even longer than if you are SENSIBLE now, and let it heal. (just my 2p worth, but it's your decision).

DB