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New Event Date: October 26-27, 2019  

Join us for camping, trail running, hiking, and live music at Lopez Lake Recreation Center.  We've moved dates to enjoy the perfect fall weather in our beautiful home of San Luis Obispo County, as well as capturing the peak late-season fitness of our guests. We truly have something for everyone who loves the outdoors, every level of fitness and for connecting with like-minded humans who are passionate about adventure. Camp at Lopez Lake or stay 10 minutes away in downtown Arroyo Grande, access scenic trails, and then swim in the lake. How can you resist?    

This event is a fundraiser for our SLO County Parks Department and helps to support their development of additional outdoor spaces for us and our entire community to enjoy! Donate today at check out please.   

Camping is limited so book direct now at SLO County Parks, https://slocountyparks.com/camp/lopez-lake/

All trail race participants receive a Finisher's Medal, an Event Shirt, ample Course Aid-Medical-Directional Support, and a First Class Festival Finish Line Party!  

Parking at Lopez Lake is $5.00 per person PREPAID at registration, or $10.00 Cash at the gate. 

BBQ and BEER can also be pre-purchased at check out or bought event day on-site.    

More questions? Email us at customerservice@raceslo.com 


Schedule of Events (Subject to change - check website and emails from us) 

Friday, October 25th:

1:00 pm to 6:00pm - Packet Pick Up and Late Registration (for races if not sold out).

Saturday, October 26th:

5:30 am - SLO Ultra Open for parking at Lopez Lake $5.00 prepaid online or $10.00 cash on site
5:45 am to 9:00 am - Packet Pick Up and Late Registration
5:30 am to 6:00 am - 50M Drop Bags Checked In, must be labeled by you with Bib#
6:30 am - 50M Trail Race Start

8:30 am - 13.1 Mile Half Marathon Trail Race Start
9:00 am - 5K Trail Race Start
10:00 am to 5:00 pm - Festival Open @ Lopez Lake Recreation Center
10:00 am - Kids Race
11:30 pm and 1:00 pm - Athlete Award Ceremonies on Stage

Registration fees

26.2 Mile Marathon Trail Run

Price changes in 3 months 15 days
  • Includes SLO ULTRA shirt, medal and awards

    1. $109.00
      Register
    2. $114.00
    3. $119.00

13.1 Mile Half Marathon Trail Run

Price changes in 3 months 15 days
  • Includes SLO ULTRA shirt, medal, awards

    1. $79.00
      Register
    2. $84.00
    3. $89.00

5K Trail Run

Price changes in 3 months 15 days
  • Includes SLO ULTRA shirt, medal, awards

    1. $39.00
      Register
    2. $44.00
    3. $44.00

50 Mile Ultra Trail Run

Price changes in 3 months 15 days
  • 50 Miles of Awesome.

    1. $159.00
      Register
    2. $164.00
    3. $169.00

Kids & Family Race

Untimed fun run. Includes event shirt.

  1. $15.00
    Sep 1 - Oct 25
    Register

BBQ Meal Ticket w/ Soft Drink

  1. $15.00
    Sep 1 - Oct 25
    Register

Vegetarian Meal Ticket w/ Soft Drink

  1. $15.00
    Sep 1 - Oct 25
    Register

Beer Ticket

Cold Beer on tap. ID required at event to recieve.

  1. $5.00
    Sep 1 - Oct 25
    Register

Race Rules

There are NO REFUNDS and all races take place rain or shine.

All course routes subject to change & race distances are estimates. 


Dogs ONLY allowed on leash in the festival. No dogs on the course. No exceptions.

No Smoking allowed. 

All race distances will require that every person carry THEIR OWN cup, bottle or hydration pack for the entire race. We will be checking at each race start that you have this on you. We are working hard to create minimal waste and leave no trace.

2019 Race Swag

26.2 Mile Marathon Run Participant Swag & Features

  • 2019 Collectible Tech short sleeve shirt unisex
  • Drop Bag for on course access 
  • Collectible finisher's medal
  • Awards (1st, 2nd, 3rd place overall Male & Female. Age groups: 19 & under, 20-29, 30-39, 40-49, 50-59, 60-69, 70 & over)
  • Bib timing
  • Ample course aid & medical support
  • Live Bluegrass & Rock Festival

13.1 Mile Half Marathon Run Participant Swag & Features

  • 2019 Collectible Tech short sleeve shirt unisex
  • Collectible finisher's medal
  • Awards (1st, 2nd, 3rd place overall Male & Female. Age groups: 19 & under, 20-29, 30-39, 40-49, 50-59, 60-69, 70 & over)
  • Bib timing
  • Ample course aid & medical support
  • Live Bluegrass & Rock Festival

5k Run/Hike Participant Swag & Features

  • 2019 Collectible Tech short sleeve shirt unisex
  • Collectible finisher's medal
  • Awards (1st, 2nd, 3rd place overall Male & Female. Age groups: 19 & under, 20-29, 30-39, 40-49, 50-59, 60-69, 70 & over)
  • Bib timing
  • Ample course aid & medical support
  • Live Bluegrass & Rock Festival

Top Donors

# Name Amount
1 Stuart Miller $10.00

Event Schedule

  • October 25 1:00 PM PDT - Friday Packet Pickup & Late Registration until 6:00 pm

  • October 26 5:30 AM PDT - Saturday Packet Pickup & Late Registration

  • October 26 5:30 AM PDT - 50M Drop Bags w/ Bib # and Tag Checked In

  • October 26 6:30 AM PDT - 50M Race Start

  • October 26 8:30 AM PDT - Half Marathon Race Start

  • October 26 9:00 AM PDT - 5K Race Start

  • October 26 10:00 AM PDT - BBQ & Live Music Festival

  • October 26 10:00 AM PDT - Kids Race Start

  • October 26 12:00 PM PDT - Award Ceremony

  • October 26 5:00 PM PDT - Festival Closes

Contact Information

Event Location

Lopez Lake Campground (entrance), Lopez Drive, Arroyo Grande, CA, USA

Click here to view map