Experience the breathtaking beauty of the George S. Mickelson Trail as part of The Fall Mickelson Trail Trek, which spans 109 miles through the heart of South Dakota’s Black Hills. This iconic rail-trail, built on a historic railroad grade and surfaced with smooth crushed limestone, offers cyclists an unparalleled view of nature's tapestry—quiet pine forests, granite outcroppings, expansive meadows, and secluded mountain valleys. In autumn, these landscapes transform into a vibrant canvas of golden aspens and deep green pines, creating one of the most picturesque times to explore. As you pedal through this scenic route, pass through four majestic railroad tunnels that echo with history and roll across over 100 towering trestle bridges, many soaring high above creeks, canyons, and forested ravines. Each mile narrates a story of the region’s rich mining past, its storied rail legacy, and untamed natural splendor. The trail's gentle grade ensures most sections are comfortably rideable for all skill levels; however, the Black Hills present their characteristic challenges with steady climbs leading to Dumont, particularly from Rochford. These ascents reward cyclists with sweeping vistas and a profound sense of accomplishment at the highest points on the trail. This trek is not just about cycling—it’s an invitation to immerse yourself in South Dakota's legendary trail during its most spectacular season. Whether you’re a seasoned cyclist or simply appreciate nature's beauty, The Fall Mickelson Trail Trek promises an unforgettable journey through history and adventure.
Races Offered
Fun Ride
Sep 18, 2026
straighten
Distance —
Fun Ride
terrain
Type —
Cycling
timer
08:00
sell
$244.15
Weather History
These values represent the 3-year monthly averages for September in Custer.
thermostatTemperature
10.7° / 22.2°
wb_sunnyFeels like
7.7° / 19.3°
light_mode
Avg sunshine hours
11h 7m
water_drop
Avg rainfall
1.5 mm
ac_unit
Avg snowfall
—
air
Avg wind speed
10.0 km/h (Light breeze)
opacity
Sweat loss rate
Moderate
terrain
Course conditions
Firm and slightly soft
sunny
Max UV Index
Moderate (5.0)
humidity_mid
Humidity
55.4%
wb_twilight
Sunrise
06:34
nightlight
Sunset
19:02
About Custer
Learn more about the host city, Custer.
Custer is a city in the southern Black Hills of South Dakota, the first city founded in the region. The city lines were laid out by the notorious Al Swearengen who was portrayed in the popular HBO series, Deadwood.