Using twitter bootstrap 2.0 – How to make equal column heights?

Here’s a responsive CSS solution, based on adding a large padding and an equally large negative margin to each column, then wrapping the entire row in in a class with overflow hidden.

.col{
    margin-bottom: -99999px;
    padding-bottom: 99999px;
    background-color:#ffc;
}

.col-wrap{  
    overflow: hidden;   
}

You can see it working at jsFiddle

Edit

In response to a question, here’s a variation if you need equal height wells or equal height columns with rounded corners: http://jsfiddle.net/panchroma/4Pyhj/

Edit

In response to a question, here’s the same technique in Bootstrap 3, same principle, just update the class names in the Bootstap grid: http://jsfiddle.net/panchroma/bj4ys/embedded/result/