RMRR Marathon Training Series

RMRR Makes Marathons Easier

RMRR’s Marathon Training Series provides 10M and 20M races that are low cost, friendly, fully supported, and officially timed.  All you need to do is focus on your running!  Our races fit perfectly in training schedules for Colfax, Boston, New York, Chicago, and other full and half marathons.

Everyone is welcome at our MTS races:  RMRR members, guests, training team members, everyone!  The course is clearly marked, and mile markers will help you gauge your time.  We’ll time your run and provide results a few days after the race, and winners of each distance will receive ribbons and running store gift certificates.  We make it easy for you to work on your pace, your nutrition and drinking, and getting everything ready for your big race.

Please be aware that our insurance won’t allow dogs or babyjoggers on our run routes.


2018 Marathon Training Series Schedule for Spring and Fall

DayDatetimeDistanceLocationResults / RegistrationRace Director
Spring Three Race SeriesAll three dates8am10M/20MPlatte River Trailhead ParkRegister at Runsignup!
SundayMarch 258am10M/20MPlatte River Trailhead ParkRegister at Runsignup!TBD
SaturdayApril 78am10M/20MPlatte River Trailhead ParkRegister at Runsignup!TBD
SundayApril 228am10M/20MPlatte River Trailhead ParkRegister at Runsignup!TBD
Fall Three Race SeriesAll three dates7am10M/20M
SundayAugust 267am10M/20MPlatte River Trailhead ParkTBD
SundaySeptember 97am10M/20MThonton Carpenter ParkTBD
SundaySeptember 237am10M/20MPlatte River Trailhead ParkTBD


Registration Details

Registration for 2018 MTS races is up and ready for you!

Register for all MTS races at RunSignup – RMRR MTS Registrations.  RMRR Members will find their discount automatically applied – it’s easy!

For mail-in registration, download the MTS application and send in with your check.

You can register on race day for $5 more each race.  Please plan to arrive at least 45 minutes early for these races to get signed in and have time to stretch out.  Races will start on time.

2018 Pricing

  • 20 Mile Combo – all three races

    • In Advance:  $45 RMRR Members      $50 Guest
    • 1st Race Day:  $50 RMRR     $55 Guest
  • 10 Mile Combo

    • $30 In Advance, $35 on first Race Day for all runners

Individual Races

  • 10 Mile Races
    • $10 In Advance, $15 Race Day
  • 20 Mile Races
    • In Advance: $15 RMRR     $20 Guest
    • Race Day: $20 RMRR      $25  Guest


Spring MTS races start at Platte River Trailhead Park in Thornton at E 88th Ave and Colorado Blvd.

Both courses use a 5 mile out-and-back segment of paved bike path.  The 10 mile runs this once, the 20 twice.   You’ll find aid stations with water, electrolyte drinks, and energy bars or gels at the start, and roughly every two miles. We’ll have post-race food, drinks, and awards for the top three 20M finishers when you’re done.  No shirts or other race gear – that’s how we keep prices low.