Grassfire Mitigation includes vegetation management, property management and prevention. The Colorado Springs Fire Department recommends creating at least 10 feet of separation immediately around the home as well as mowing grasses and weeds to a height of no more than 4 inches at least 30 feet from any structure, but not to extend beyond the property line. You can manage the vegetation beyond 30 feet as long as you do not encroach on your neighbor. Remember, you can't treat what you don't own!