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Event Distance(s) State / City
Bad Apple Ultra
The 3-Hour/ 6-Hour / and 12-Hour racers will each start at different times, which are listed below. The goal of the event is to run/walk/crawl as many laps (miles) as you possibly can in the allotted ...(continued)
12 Hours
6 Hours
3 Hours
Michigan
Greenville
Badgerland Striders
400 Meter track ultra.
24 Hours
Wisconsin
Germantown
Badwater Ultramarathon 135 mile
The Kiehl's Badwater Ultramarathon is the world's toughest and most prestigious foot race. The next edition of this legendary, epic, 135 mile, invitational running race from Badwater in Death Valley (elev. 280 feet below sea level) to Whitney Portals on Mt. Whitney (elev. 8360 feet) takes place July 11-13, 2005.
135 Miles
California
Death Valley
Baker Lake 50k Trail Run
The Baker Lake Trail Run occurs in a beautiful serene, fall setting. The 50K out and back course offers unique features, beautiful forested trail, and awesome scenery. The run starts in the Kulshan Ca ...(continued)
50 K
Washington
Concrete
Baker Trail UltraChallenge: 50 Mile Ultramarathon and Relay
50 mile ultramarathon on the Baker Trail which consists of hiking trail and roads. Open to solo runners and relay teams of up to 5 members. A map will be available in a couple of weeks. Questions: email or post on facebook.
50 Mile
Pennsylvania
Godfrey


Baldy Peak 50K
32.14 Miles. Two unequal loops with one ear. 10,775 ft climb..10,775 ft of descent.
50 K
California
Mt. Baldy Village
Bandera
Old classic. techTs, original awards, USA 100km Trail Championships. Montrail Ultra Cup. Aid every 5 miles. Rugged and rocky.
100 Mile
50 K
25 K
Texas
Bandera
Bandera 100K
Single-track & jeep road. All dirt & very rugged
100 K
50 K
25 K
Texas
Bandera
Bandit Ultra Trail Run
2013 Ultra Trail Runs in Southern California
50 K
30 K
15 K
5 K
California
Simi Valley
Barrel to Keg Relay
Mark your calendars now for the inaugural Barrel to Keg Relay on July 23, 2011! This 62 mile (100K) twelve leg relay race, open to teams of two, four and six runners.
100 K
Oregon
Philomath
Bartram Forest 50K and 26.2 miler
No Time Limit.
50 K
Marathon
Georgia
Milledgeville
Bel Monte Endurance Run
The race begins and ends at Sherando Lake, in the heart of the George Washington National Forest. The course covers some the most scenic portions of this area on the east coast, with over 90% single track trail and about 10% fire and gravel roads.
50 Mile
50 K
25 K
Virginia
Charlottesville
Bel Monte Endurance Runs
UltraRace Ultramarathon Virginia Wintergreen race 50k 25k
50 Mile
50 K
25 K
Virginia
Wintergreen
Berkeley Trail Adventure
Our Berkeley Adventure Run brings runners and walkers into two East Bay gems. Tilden Regional Park offers something for everyone, including big time trail running. With abundant coast live oak and euc ...(continued)
50 K
35 K
Half Marathon
10 K
California
Berkeley
Berryman Trail Run
Two loops for the 50 mile, 1 for the Marathon, plus a short out and back for each.
50 Mile
Marathon
Missouri
Potosi
Big Basin Redwoods Trail Run
Established in 1902 as the California Redwood Park, this is the oldest park in California. Enjoy these popular hiking trails among the magnificent redwoods.
50 K
25 K
California
Boulder Creek
Big Bend 50
This years race feature a new course and new distances. The new courses will be run on Glenn Springs Road and Black Gap Road, finishing on River Road. Spectacular!
50 K
25 K
Texas
Big Bend National Park
Big Brad Ultras
50k and 50 mile races on primarily single-track trails over hilly, technical terrain. There is approximately 1/4 mile of paved road and 1 mile of dirt road on the 15.5 mile course. 50k runners will co ...(continued)
50 Mile
50 K
Maine
Pownal
Big Dog Ultra Trail Run
50 K
Other
Other
Other
Louisiana
Homer
Bigfoot Snowshoe Festival 50K, Marathon, 25K, 10K and 5K
Come Join us at the only Ultra Snowshoe event in the Country along with the Marathon 25K, 10K and 5K, there is a distance for everyone.
50 K
Marathon
25 K
10 K
5 K
Utah
Midway
Bighorn Mountain Wild & Scenic Trail Run
The annual Bighorn Trail 100 Mile Run is an arduous trail run that will take place in the Little Bighorn – Tongue River areas of the Bighorn National Forest. Starting time for the event will be 11 AM, with a 34 hour (average pace of 2.94 mph) time limit to finish the event.
100 Mile
50 Mile
50 K
30 K
Wyoming
Sheridan
Bimblers Bluff 50K
The Bimblers Bluff 50k is an off road foot race through several inter-connected woodland preserves in southern Connecticut. Consisting entirely of rolling forest roads or single track that can be extr ...(continued)
50 K
Connecticut
Guilford
Birmingham Stage Race
This will be a 3 day stage race on three mountains in Birmingham with a total distance of 50 miles. The first stage will be at Red Mountain Park, 12 miles, second stage at Ruffner Mountain and 14 mil ...(continued)
50 Mile
Alabama
Birmingham
Bizz Johnson 50 Km
The Bizz Johnson Trail begins at Mason Station and travels through scenic Lassen National Forest. The first few miles of the course climb 280 feet through the forest to Westwood Junction, then it’s do ...(continued)
50 K
Half Marathon
10 K
California
Susanville
Black Mountain Monster 5k/6hr/12hr (day and night)/24hr Relay Race
Black Mountain Monster 5K/6hr/12hr (day & night)/24hr Ind. & Team Race
24 Hours
12 Hours
6 Hours
5 K
North Carolina
Black Mountain
Black Mountain Monster 5k/6hr/12hr/24hr Relay Race
Black Mountain Monster 5k/6hr/12hr (day & night)/24hr Individual & Team Relay Race
24 Hours
North Carolina
Black Mountain
Black Warrior 50K Trail Run
The course contains rolling hills the entire way. There are no major climbs but some moderately challenging sections. There will also be several creek crossings. It will be open for 9 hours
50 K
Alabama
Moulton
Blackwater 50k
A fairly flat and fast 50k through the pine forests and diverse ecosystems of Blackwater State Park starting and finishing at Bear Lake park.
50 K
Marathon
10 Miles
10 K
5 K
Florida
Munson
Blazing 7s Trail Run
Blazing 7's Trail Run: 100m, 100k, 50k, 25k, 10k, 100m Relay and 100k Relay (5 person max) trail race by Trail Racing Over Texas.
100 Mile
100 K
50 K
25 K
10 K
Texas
Cat Spring
Blazing Sevens
The Blazing 7s Trail Runs is held at the beautiful 7iL ranch just outside of Bellville Texas. The ranch has been open for more than 5 generations and opened in 1999 for public use. The facility is ove ...(continued)
100 K
50 K
25 K
10 K
Texas
Cat Spring
Blind Pig 100
100 mile trail ultramarathon
100 Mile
North Carolina
Spartanburg
Blue Springs Trail Marathon & 50 Mile / 50 K
50 Mile
50 K
Marathon
Missouri
Blue Springs
Blues Cruise 50K Trail Ultra
The Blues Cruise 50K Trail Ultra race is suitable for first time ultra runners as well as seasoned runners. We are able to reach this goal by having a course that is very runnable, not too technical, but challenging enough to make it interesting for everyone. Our themed aid stations are well stocked and serviced by local (ultra) runners.
50 K
Pennsylvania
Leesport
Bohemian Alps Endurance Run Brainard Nebraska
32 miles of rolling hills, gravel and dirt roads through scenic rural Butler and Saunders counties, some bike trail and some Cross Country course, very little pavement. Crew friendly loop course star ...(continued)
50 K
Nebraska
Brainard
Bootlegger 50K
Two loop course ran through the Bootleg Canyon area of Boulder City, NV. Course has views of Lake Mead and the Las Vegas Strip. Mild temps with typically sunny skies in November.
50 K
Nevada
Las Vegas
Born To Run: Primal Challenge
Set within, Cross Timbers State Park in Toronto, Kansas, the Born To Run primal challenge features a single track forest trail with open meadows, a few small stream crossings, if there has been rain, a couple of slopes, no big hills and a few rocky areas. This is a “very fast course,” so if you’re looking to break a trail PR this will be the trail to do it on...featuring 6 mile, 15 mile, and 30 mile runs. In addition, the third weekend in October is traditionally the time of year when all the trees at Cross Timbers State Park are at the peak of their fall colors, so the scenery promises to be memorable All runs are open to barefoot/minimalist and shoed runners!!!
30 Miles
15 Miles
6 Miles
Kansas
Toronto Lake
Boulder 100
Fast, flat course with lots of aid stations. The course is run on the trails around the beautiful Boulder Reservoir. It consists of 7.14 mile laps and runners will be given 30 hours to complete the co ...(continued)
100 Mile
30 Hours
Colorado
Boulder
Boulder Field 50K and 100K
The Boulder field 100k/50k was created to offer a new, more challenging race to our runners. We do believe that every properly trained runner can tackle this challenge but it will be more difficult than our other trail races.
100 K
50 K
Pennsylvania
White Haven
BoulderDash 13K/30K Trail Run
BoulderDash 13k/30K Trail Run through Chiricahua National Monument! Run through the rocks on this incredible trail!
30 K
13 K
Arizona
Willcox
Brazos Bend 100
The Brazos Bend 100 Miler will aim to be the fastest race in Texas and the NATION with its mostly flat course, easy aid stations and wildlife to watch its the perfect set up for some PRs and some reco ...(continued)
100 Mile
50 Miles
Marathon
Half Marathon
Texas
Needville
Brazos Bend 50
The Brazos Bend 50 Miler will aim to be the fastest race in Texas with its mostly flat course, easy 2 way aid stations and wildlife to watch its the perfect set up for some PRs and some records to be ...(continued)
50 Mile
50 K
25 K
10 K
Texas
Needville
Brazos Bend KEEP On TRUCKIN Trail Races
This race is to raise awareness for Brazos Bend State Park. Donations for the Brazos Bend State Park Volunteer Organization will be accepted on race day. There will be an awesome after party and we w ...(continued)
50 Mile
50 K
25 K
10 K
Texas
Needville
Brew to Brew 44-Mile Solo & Relay
Point to point from the Boulevard Brewery,KC MO, to the Free State Brewery, Lawrence KS.
44 Miles
Missouri
Kansas City
Bridle Trails Twilight Ultra
The Bridle Trails Winter Trail Running Festival will include 5-mile, 10-mile, 50K solo, and 50K relay races at Bridle Trails State Park in Kirkland.
50 K
10 Mile
Washington
Kirkland
Bryce Canyon 100 Mile, 50 Mile, 50K and Half Marathon
A 100 mile mountain course (50 mile and 50k also) that is consistently ready to run in June each year and rewards runners with unbelievable views of the hoodoos unique to the Bryce Canyon area as well ...(continued)
100 Mile
50 Mile
50 K
Half Marathon
Utah
Hatch
Buckeye Trail 50K
Out-and-back course on primarily a single track trail. The course composition includes rocks, roots, and stream crossings. The course includes approximately 2,500' of elevation gain and 2500' of elevation loss.
50 K
Ohio
Boston Township
Bull Run Run
The Bull Run Run is a beautiful, tough run on the Bull Run Trail in Northern Virginia. The VHTRC was formed in 1992 to sponsor the first Bull Run Run in April 1993.
50 Mile
Virginia
Clifton
Bulldog 50K Ultra Run and 25K Trail Run
Challenging and scenic 50K/25K course on fire roads and trails in mountainous terrain with spectacular ocean and valley views.
50 K
25 K
California
Calabasas
Burning Bear Trail Run & Ultra
20mi & 40mi (approx) - 20mi course has 5,000' of climbing, between 9,530'-11,750'. 40mi course has 10,000' of climbing, up to 12,430'. Geneva Park, CO (~5mi south of Guanella Pass).
40 Miles
18 Miles
Colorado
Colorado Springs
Burning River 100 Mile Endurance Run
The First Annual Burning River 100 Mile Endurance is a point-to-point run that begins in Willoughby Hills, Ohio and finishes in Cuyahoga Falls, Ohio.
100 Mile
Ohio
Willoughby Hills
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