The Cahuilla Rez Ultra returns to Anza, California on October 17th, offering runners a unique opportunity to traverse the beautiful terrain of the Cahuilla Indian Reservation while supporting youth programming initiatives for the tribe's young members. Participants can choose from multiple distances ranging from a half marathon and tribal member 5k up to an ultra-endurance challenge in either six hours, twelve hours, twenty-four hours, or even an ambitious 100-mile race. The event takes place on double-track dirt roads within the reservation boundaries, providing both scenic views and challenging elevation changes. The Cahuilla Rez Ultra has been a staple of Anza's running community for several years now, raising funds specifically for youth programs that aim to educate and entertain tribal children throughout the year. This annual gathering not only promotes physical fitness but also cultural awareness through its unique setting on the reservation grounds. For those opting into longer races like the 12-hour or 24-hour events, the course presents a runnable two-mile loop with an elevation gain of 170 feet per lap and cumulative climbs over extended distances. The terrain is firm yet slightly soft underfoot due to its natural composition, making it both navigable and engaging for runners. Race morning typically greets participants with crisp temperatures around 17 degrees Celsius, though the range can vary from a minimum of 11.1C to a maximum of 23.6C depending on specific weather patterns each year. The wind is generally light at an average speed of 9.3 km/hour while humidity remains relatively low at about 40%. With minimal risk of rainfall, runners can expect dry conditions and clear skies.
The logistics for the Cahuilla Rez Ultra are straightforward yet essential to note. Registration opens through a direct link: https://ultrasignup.com/register.aspx?did=131405 where fees range from $160 for the half marathon up to $300 for the 100-mile challenge, with lower costs for shorter events such as the six-hour and twelve-hour races. Early registration is recommended due to limited spots. Bib pickup occurs on race day at the Cahuilla Indian Reservation's softball field starting from 6am for early starters like those in the longer distance categories. Participants should bring their confirmation email or printed entry receipt, proof of age if under eighteen years old (for half marathon runners), and any identification required to pick up their bib number. The start location is located at 2000 Cahuilla Rd, where all participants gather before embarking on their chosen distance journey. Age restrictions apply for the shorter races like the tribal member 5k with a minimum age of thirteen years old. For those planning an overnight stay, RV parking and tent camping are available on-site but in limited quantities; car camping is allowed within the adjacent dirt lot. The Cahuilla Rez Ultra will take place at the Anza location in California on October 17th, offering participants a chance to run through historical landscapes while contributing directly to local youth development programs.
Races Offered
100 Miler
Oct 17, 2026
straighten
Distance —
160.9K
terrain
Type —
Running
timer
07:00
sell
$300.00
12hrs
Oct 17, 2026
straighten
Distance —
12 Hours
terrain
Type —
Running
timer
07:00
sell
$180.00
24hrs
Oct 17, 2026
straighten
Distance —
24 Hours
terrain
Type —
Running
timer
07:00
sell
$200.00
6hrs
Oct 17, 2026
straighten
Distance —
6 Hours
terrain
Type —
Running
timer
07:00
sell
$170.00
Half Marathon
Oct 17, 2026
straighten
Distance —
21.1K
terrain
Type —
Running
timer
08:00
sell
$160.00
Tribal Member 5k
Oct 17, 2026
straighten
Distance —
5K
terrain
Type —
Running
timer
08:00
sell
$0.00
Weather History
These values represent the 3-year monthly averages for October in Anza.
thermostatTemperature
11.1° / 23.6°
wb_sunnyFeels like
7.6° / 19.2°
light_mode
Avg sunshine hours
10h 50m
water_drop
Avg rainfall
0.3 mm
ac_unit
Avg snowfall
—
air
Avg wind speed
9.3 km/h (Light breeze)
opacity
Sweat loss rate
Moderate
terrain
Course conditions
Firm and slightly soft
sunny
Max UV Index
Moderate (4.0)
humidity_mid
Humidity
39.2%
wb_twilight
Sunrise
06:52
nightlight
Sunset
18:11
About Anza
Learn more about the host city, Anza.
Anza is a census-designated place in Riverside County, California, in the Anza Valley, a semi-arid region at a mean elevation of 3,921 feet (1,195 m) above sea level. It is located 13 miles (21 km) south of Idyllwild, 32 miles (51 km) east-northeast of Temecula, 40 miles (64 km) southwest of Palm Springs, and 90 miles (140 km) northeast of San Diego, being traversed by State Route 371. Anza is on the Pacific Crest Trail and the Juan Bautista de Anza National Historic Trail. The population was 3,075 at the 2020 census.
