Thunder River takes place in Cascade Locks, Oregon on October 31st, welcoming runners to the iconic Columbia River Gorge with its unique fall courses. The event features a point-to-point course for the 50K and an epic lollipop loop for the 25K race. Both races culminate around Thunder Island before finishing at Marine Park. On race morning, participants can expect clear views of the river as they start their journey through the Gorge's trails. The atmosphere is serene with a mix of fall foliage coloring the landscape and early autumn chill in the air. Runners will experience the tranquility of Marine Park and its expansive surroundings before embarking on the challenging yet scenic trail routes. Thunder River has been running for several years, showcasing world-class scenery and fostering community support through its races. The event attracts a diverse group of runners who appreciate both the physical challenge and the natural beauty of the Columbia River Gorge. Proceeds from Thunder River contribute to local conservation efforts aimed at preserving this unique landscape. The course starts in Marine Park and winds along trails that provide scenic views and challenging terrain. Runners will encounter firm yet slightly soft trail conditions, with notable features including a loop around Thunder Island near the finish line. Aid stations are strategically placed throughout both courses for participants' hydration and energy needs. October weather averages 12.8 degrees Celsius in Cascade Locks, ranging from an early morning low of about 8.8 to a high of approximately 16.8 by late afternoon. The average wind speed is around 6.8 kilometers per hour with humidity at 85.2%. Trail conditions are firm and slightly soft underfoot. Runners should expect light rainfall, totaling roughly 4.2 millimeters over the day. The race offers a challenging yet scenic option for both the 50K and 25K distances.
50K 50K • Start: 08:00:00 • Fee: $140.00
25K 25K • Start: 10:00:00 • Fee: $110.00
Registration is available at https://ultrasignup.com/register.aspx?did=134929, with fees of $110 for the 25K and $140 for the 50K race. The registration deadline is October 27th to ensure bib pickup on site from 6:30 AM to 8:00 AM at Marine Park Pavilion. Participants must pick up their race packet, which includes a wristband or chip timing device if necessary. Age requirements are set at 18 years old for all runners due to the challenging nature of both distances and trail conditions. Runners should come prepared with appropriate gear including water bottles, energy snacks, and layers to adjust for changing temperatures. Thunder River in Cascade Locks on October 31st offers a unique blend of scenic beauty and physical challenge within the Columbia River Gorge region, making it an ideal event for those seeking both adventure and community engagement.
Races Offered
50K
Oct 31, 2026
straighten
Distance —
50K
terrain
Type —
Running
timer
08:00
sell
$140.00
25K
Oct 31, 2026
straighten
Distance —
25K
terrain
Type —
Running
timer
10:00
sell
$110.00
Weather History
These values represent the 3-year monthly averages for October in Cascade Locks.
thermostatTemperature
8.8° / 16.8°
wb_sunnyFeels like
7.2° / 15.4°
light_mode
Avg sunshine hours
6h 56m
water_drop
Avg rainfall
4.2 mm
ac_unit
Avg snowfall
—
air
Avg wind speed
6.8 km/h (Light breeze)
opacity
Sweat loss rate
Low
terrain
Course conditions
Firm and slightly soft
sunny
Max UV Index
Low (2.8)
humidity_mid
Humidity
85.2%
wb_twilight
Sunrise
07:25
nightlight
Sunset
18:19
About Cascade Locks
Learn more about the host city, Cascade Locks.
Cascade Locks is a city in Oregon on the Columbia River.
