How do you marinate a round roast?

It does depend on what you have a taste for. I will give a few examples of what I choose to use to give you an idea:

1. After you set the roast in the dish you are gonna cook it in, get some soda (Sundrop, 7up or Ginger Ale) poor in a small bowl, then add some steak sauce of your choice, next add Mrs. Dash and meat tenderizer...last pour over your roast and let soak for an hr. Then go flip it to the other side for an hr. This will soak in your mixture. When you are finished marinating leave in what juices are left to cook.

2. After you set the roast in the dish you are gonna cook it in, get some soda (Sundrop, 7up or ginger ale) poor in a small bowl, add juice from mushrooms (if you like) or cut up onions, next add Mrs. Dash and meat tenderizer...last pour over your roast and let soak for an hr. Then go flip it to the other side for an hr. This will soak in your mixture. When you are finished marinating leave in what juices are left to cook.

3. After you set the roast in the dish you are gonna cook it in, get some soda (Sundrop, 7up or ginger ale) poor in a small bowl, add garlic powder or from jar garlic (you can pick up from dollar general), next add Mrs. Dash and meat tenderizer...last pour over your roast and let soak for an hr. Then go flip it to the other side for an hr. This will soak in your mixture. When you are finished marinating leave in what juices are left to cook.

Hope this helps...