MiniProfilerTraceListener is a custom TraceListener that sends all messages to the StackExchange MiniProfiler.

MiniProfilerTraceListener.cs

using System.Diagnostics;
using StackExchange.Profiling;

namespace PSL.Web.Infrastructure
{
    //Needs web.config entry
    //<add name="TraceToMiniProfiler" type="PSL.Web.Infrastructure.MiniProfilerTraceListener, theassemblyname" initializeData="" />
  
    public class MiniProfilerTraceListener : TraceListener
    {
        public override void Write(string message)
        {
            WriteToProfiler(message);
        }

        public override void WriteLine(string message)
        {
            WriteToProfiler(message);
        }

        private static void WriteToProfiler(string message)
        {
            MiniProfiler profiler = MiniProfiler.Current;
            using (profiler.Step(message))
            {
            }
        }
    }
}