The trip will last 4 to 6 hours depending on how many you have eaten. As for your urine it will take about 5 to 6 days to clear out. Now like all drugs this also depends on how often you take Magic Mushrooms and how fast your body metabolizes things. Here is some help for your urinalysis. Drink very large amounts of water on up till the day of your drug test. Than 30 minuets before your drug test drink a dark soda. Reason for this is because the water will completely cleanse your system which will throw up a red flag to the person administering the urinalysis. This is where the dark soda comes in. This will put enough toxins back into the body so that your urine will look just like the average Joe.