Trail
100 Mile
161 km
Registration: 0.00 USD
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Race month
October · 53°–77°
Distances
160.9k, 50k
Results
Official finisher lists are published by the race organiser.
View official resultsDistances
Trail
50K
50 km
Registration: 0.00 USD
Finish-time calculator
Your finish time
Slide to your target pace — and see when you’ll hit the line.
6:00
min / km
← faster · 2:0012:00 · easier →
16:05:36
Estimated finish · 161 km
10 km1:00:00
5 km30:00
Where am I when? · Splits
Start
0:00
5 km
30:00
10 km
1:00:00
15 km
1:30:00
20 km
2:00:00
25 km
2:30:00
30 km
3:00:00
35 km
3:30:00
40 km
4:00:00
45 km
4:30:00
50 km
5:00:00
55 km
5:30:00
60 km
6:00:00
65 km
6:30:00
70 km
7:00:00
75 km
7:30:00
80 km
8:00:00
85 km
8:30:00
90 km
9:00:00
95 km
9:30:00
100 km
10:00:00
105 km
10:30:00
110 km
11:00:00
115 km
11:30:00
120 km
12:00:00
125 km
12:30:00
130 km
13:00:00
135 km
13:30:00
140 km
14:00:00
145 km
14:30:00
150 km
15:00:00
155 km
15:30:00
Finish
16:05:36
Estimates only · form, weather, and hills can change the result.
Course & climate
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What to expect
What makes this race distinct — for training and race day.
A 100-mile endurance run set in the Sierra-Nevada foothills along Folsom Lake, combining trail and pavement with scenic oak woodlands, meadows, bridges, and creeks.
Catering & aid stations
Aid stations offer assorted GU energy products (caffeinated and non-caffeinated gels), water, Skratch hydration sports drinks (Lemon+Lime non-caffeinated and Raspberry Limeade caffeinated), Coke, Ginger Ale, Red Bull, boiled potatoes and a complete line of ultra sweet and salty foods. All stations provide PB&J and JAMBARS Organic Energy Bars (Musical Mango, Malt Nut Melody, Chocolate Cha Cha, Jammin’ Jazzleberry). Nighttime stations feature hot veggie broth soup and quesadillas. Due to the cupless policy, participants must bring their own cups for aid stations.
Pacers
Pacers are provided with target times per Startwave displayed at the start and on the event website. Pacers carry flags to identify their wave. Refer to the official Rio Del Lago pacing schedule for assigned target times and pacer responsibilities.
What does it cost?
| 100 Mile | 0.00 USD |
|---|---|
| 50K | 0.00 USD |
What's included in entry
- Bib and timing chip
- Course markers and aid stations
- Support vehicle access at designated zones
- Event souvenir
- Nutrition on course
Stay & get to the start
Getting there
Assumed starting point
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Estimating travel…
Hotels near the start
Route maps
FAQ
Do I have to finish the 100 miles to complete the event?
No — the event allows participants to finish either the 100 Mile or the 50K. You can choose your distance at the start and are not required to complete the longer distance.
Are there age restrictions or participant requirements?
The event recommends participants be at least 21 years old by race day and requires a mandatory crew briefing for safety and course protocol.
What happens if I’m not finished by the time limit?
The course will remain open past the official cutoffs; however, aid stations will stop serving hot food after the specified times. Plan your nutrition and pacing accordingly and consult the event cut-off details in the participant guide.
Can I volunteer or spectate at the event?
Volunteer signups are managed through the official event page. Spectators are welcome at designated locations, but certain aid stations are NO CREW zones — please review the no-crew access list to avoid disqualification.
Last updated: Jun 6, 2026, 12:18:32 AM
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