mark twain

endurance runs

2017 Race will be held on September 16-17th.

Registration is open now on!


When – Saturday & Sunday, September 16-17, 2017

Start Time: 6:00 a.m.

Where – Berryman Trail, Steelville MO

Distances – 50/100 mile

Surface – Trail

Time limit: 32 Hours -100, 16 hours -50

Elevation – 10,000 feet of ascent/10,000 feet of descent (100), 5,000 feet of ascent/5,000 feet of descent (50)




Race Records:


100 Mile


'13 John Cash (40) 18:21:38

'12 John Cash (39) 19:41:50

'14 Derek Glos (34) 20:19:00

'13 Chris Wright (41) 21:36:00

'15 Josh Allen (40) 21:41:50

'13 Jeffrey Jones (33) 21:45:00

'12 Paul Wilkerson (36) 21:50:41

'14 Travis Redden (30) 22:26:44

'13 Mike Christensen (55) 22:40:16

'14 David Box (38) 22:41:58




'14 Jennifer Eichelberger (43) 24:24:14

'12 Jennifer Eichelberger (41) 25:30:54

'12 Coleen Voeks (39) 25:53:56

'13 Casey Ulman (42) 26:29:56

'15 Amber Rustemeyer (32) 28:41:05

'13 Richelle Hall (29) 29:14:36

'14 Shalini Kovach (38) 30:25:32

'14 Karyn Weber (48) 30:34:04

'15 Robin Saenz (59) 30:40:34

'14 Tara Hoeft-Runde (37) 30:42:11

  • Volunteer

    Submitting Form...

    The server encountered an error.

    Form received. Thanks for volunteering.



“There are basically two types of people. People who accomplish things and people who claim to have accomplished things. The first group is less crowded.” - Mark Twain


Location: Berryman Campground - Berryman, MO


Start Date/Time: Saturday September 16, 2017 6:00am CDT


Distance: 50 Mile Run (2 x 25 mile loop) * 100 Mile Run (4 x 25 mile loop)


Elevation: 2,500/ft.of ascent/descent per 25 Mile Loop * 5,000/ft. gain/loss for 50 Mile Run * 10,000/ft. for 100 Mile Run


Time Limit: 50 Mile Run -16 hours * 100 Mile Run - 32 hours


Aid Stations: 5 manned including 2 drop bag locations with crew access per loop


Pacers: 100 Mile Runners can use a pacer starting with their 3rd loop (50 Miles) through the finish


Finisher Awards: 50 Mile Run- Distance Medal * 100 Mile Run- Belt Buckles * Two-Tone Buckle for sub-24 hours


Special Awards: 100 and 50 Mile Female/Male Winners - Mark Twain Marble Statue


The Mark Twain Endurance Runs, presented by the Saint Louis Ultrarunners Group, are in their 6th year. We provide excellent aid and a great venue with generous time limits to provide both the most veteran of runners and first timers a great experience.


The course is a 99% single track trail race with held in the Mark Twain National Forest outside Berryman, MO on the Berryman Trail located about 1.5 hours from St. Louis, MO. The Berryman Trail is a 25+ mile loop that will be repeated 2 (50 Mile Run) or 4 times (100 Mile Run) counterclockwise. Each loop starts and stops in the Berryman Campground where you and your crew/family are welcome to stay and camp at no cost.


The Berryman Trail traverses many Ozark hills and features long, sustained climbs and fast, rocky descents. The trail is customarily divided into 2 parts; the western 14+ mile section between Berryman Campground trailhead and the Brazil Creek Campground trailhead, and the eastern 10+ miles from Brazil Creek back to the Berryman Campground which completes the loop. The Ozark Trail makes use of the western part of the loop from where it joins it at Harmon Spring, to just west of the Berryman Campground. The Brazil Creek to Berryman Campground section has numerous climbs and descents, none of them really steep, which cross several valleys. This section is also quite rocky with many exposed roots. The western section, while longer, generally contains less climbing, but isn't necessarily easier.


The 2016 Mark Twain Endurance Runs provided much excitement with our 100 Mile F1 Jennifer Rolfing take the lead in the final miles of the race. Our 100 Mile M1 Jason Wagner outpaced the 3 other runners who were equal with him after the second loop. We hope you will join us in September to help us write another great story!


Mark Twain Endurance Runs participates in the Trail Runner Trophy Series.


Additionally, Mark Twain Endurance Runs will be a UTMB/CCC Points Qualifier for 2018 as it was for 2017.


Nearly Live Runner Tracking: Via Twitter @mter100_50



Friday 9/15/17 * 5-7pm- Pre-Race Meal and Race Briefing at Huzzah Valley Resort

Saturday 9/16/17 * 6am- 50 and 100 Mile Run Start * 10pm- 50 Mile Run Ends

Sunday, 9/17/17 * 2pm- 100 Mile Run Ends


Training Run/Course Preview: TBA in August 2017


Entry Fees and Policy


50 Mile Run- $90 before January 1st, 2016, $110 January 1st – August 31st, 2017, $130 after September 1st, 2017.

100 Mile Run- $165 before January 1st, 2016, $190 January 1st – August 31st, 2017, $215 after September 1st, 2017.


There are no refunds or bib transfers. There will not be any rollovers to next year’s race. No guarantee on swag or finishers medals to registrations made after August 31, 2017.





Copyright St.Louis Ultrarunners group 2015 (c)