Based on the skills and experience listed, Catherine's rate is estimated to be around $125 per hour. This is a reasonable rate for a digital marketing professional with project management skills in San Francisco. According to national averages, digital marketing managers with similar experience can earn between $80,000 and $120,000 per year. Considering her skills and location, a rate of $125 per hour is a fair estimate, which translates to around $250,000 per year. However, this is just a rough estimate and may vary based on specific factors such as client type, project scope, and industry demand.