How to Tour the Upper Otay Reservoir

The Upper Otay Reservoir, nestled in the scenic hills of southern San Diego County, California, is a vital component of the region’s water infrastructure and a hidden gem for nature enthusiasts seeking quiet, off-the-beaten-path outdoor experiences. While primarily managed by the San Diego County Water Authority for water storage and flood control, the reservoir and its surrounding lands offer limited but remarkable opportunities for guided public access, environmental education, and low-impact recreation. Unlike more popular destinations such as Lake Hodges or Miramar Reservoir, Upper Otay Reservoir remains relatively undiscovered by tourists—making it an ideal location for those seeking solitude, pristine landscapes, and a deeper connection with Southern California’s natural hydrology.

Touring the Upper Otay Reservoir is not a casual hike or a standard park visit. It requires preparation, awareness of access restrictions, and respect for the site’s operational purpose. This guide provides a comprehensive, step-by-step roadmap for safely and responsibly experiencing the reservoir—whether you’re a local hiker, a photography enthusiast, a student of environmental science, or a curious traveler seeking authentic California landscapes. By following this guide, you’ll learn how to navigate access protocols, understand ecological significance, and maximize your visit while preserving the integrity of this critical water resource.

Step-by-Step Guide

Step 1: Understand the Purpose and Restrictions

Before planning your visit, it is essential to recognize that the Upper Otay Reservoir is not a public park. It is a functional water storage facility operated by the San Diego County Water Authority (SDCWA). Unlike recreational lakes, this site does not permit swimming, boating, fishing, or off-trail exploration. The surrounding land is protected to ensure water quality, prevent contamination, and maintain operational efficiency. Public access is strictly limited to designated viewing areas and scheduled guided tours.

Unauthorized entry is prohibited and may result in fines or legal action. Security patrols and signage are present along perimeter roads. Respect these boundaries at all times. Your goal is not to explore freely, but to observe responsibly. This mindset forms the foundation of a successful and ethical visit.

Step 2: Check for Scheduled Public Tours

The only legal and safe way to tour the Upper Otay Reservoir is through official, pre-registered guided tours offered periodically by the San Diego County Water Authority. These tours are typically held once or twice per year, often during spring or early fall, when weather conditions are optimal and water levels are stable.

To find upcoming tour dates:

• Visit the official SDCWA website at www.sdcwa.org
• Navigate to the “Education & Outreach” or “Public Tours” section
• Sign up for their newsletter to receive announcements about tour openings
• Contact the SDCWA Community Relations team via email for inquiries (no phone calls required)

Tours are usually limited to 15–20 participants per session and fill up quickly. Registration opens approximately six to eight weeks in advance. Be prepared to provide your full name, contact information, and a brief statement of interest (e.g., educational purpose, photography, environmental advocacy). Priority is often given to students, educators, and local residents.

Step 3: Prepare for the Tour Day

Once registered, you will receive a confirmation email with detailed instructions. Follow these preparation steps carefully:

• Dress appropriately: Wear closed-toe, non-slip hiking shoes. The terrain is rocky and uneven. Long pants and a lightweight long-sleeve shirt are recommended to protect against sun exposure and brush.
• Bring essentials: A reusable water bottle, sunscreen, a hat, and a small backpack. No food or beverages are allowed beyond water. Do not bring pets, drones, or professional camera equipment without prior written approval.
• Arrive early: Plan to arrive at least 20 minutes before the scheduled start time. Late arrivals may not be permitted to join the tour.
• Check the weather: Tours may be canceled due to high winds, extreme heat, or wildfire risk. Monitor the SDCWA website or your email for last-minute updates.

Step 4: Attend the Orientation and Safety Briefing

Upon arrival, you will be greeted by a SDCWA representative and a trained environmental educator. A mandatory 10–15 minute safety and compliance briefing will be conducted. This includes:

• Review of restricted zones and boundaries
• Prohibited items (including tripods, drones, and large bags)
• Emergency procedures and contact points
• Environmental ethics: Do not disturb wildlife, vegetation, or water quality indicators

Participants must sign a liability waiver and agree to follow all instructions. This is not a formality—it is a legal and ecological safeguard.

Step 5: Walk the Designated Viewing Trail

The tour typically begins at the Upper Otay Reservoir Viewing Area, located off Otay Lakes Road near the intersection with Chula Vista’s eastern boundary. From there, a paved, ADA-accessible trail leads approximately 0.3 miles to a secure observation platform overlooking the reservoir.

The path is flat and well-maintained, with interpretive signage explaining:

• The reservoir’s role in regional water supply
• Native plant species and their adaptation to Mediterranean climates
• How sediment control and water quality monitoring systems operate
• Historical context: The reservoir was completed in 1965 and expanded in the 1990s to meet growing demand

Photography is permitted from the platform, but zoom lenses are discouraged unless pre-approved. Avoid leaning over railings or attempting to access restricted areas for a better shot. The view is intentionally designed to offer a panoramic, safe, and educational perspective.

Step 6: Engage with the Educator and Ask Questions

This is your opportunity to learn directly from professionals managing one of San Diego’s most critical water assets. Common topics discussed include:

• How droughts affect reservoir levels and conservation measures
• The role of groundwater recharge in the region
• Wildlife corridors and habitat preservation efforts
• Future expansion plans and climate adaptation strategies

Ask thoughtful questions. For example:

• “How does the reservoir contribute to the overall water balance in San Diego County?”
• “What happens if water levels drop below critical thresholds?”
• “Are there any invasive species affecting the surrounding ecosystem?”

These interactions deepen your understanding and may even lead to invitations for future volunteer opportunities or educational programs.

Step 7: Depart Responsibly

At the end of the tour, you will be escorted back to the parking area. Do not linger, collect rocks, or leave any trace. Remove all personal items, including wrappers, tissues, or empty bottles. The site is monitored for litter and environmental impact.

After your visit, consider sharing your experience (without revealing exact coordinates or security details) on social media or local community boards to raise awareness about responsible water resource appreciation. Tag @SDCWA and use hashtags like

UpperOtayReservoir and #WaterConservationCA to support public education efforts.

Best Practices

Practice Leave No Trace Principles

Even though you are on a guided tour, you are still in a sensitive natural environment. Follow the seven Leave No Trace principles:

1. Plan ahead and prepare: Know the rules, weather, and tour logistics before you arrive.
2. Travel and park on durable surfaces: Stay on paved paths and designated parking areas.
3. Dispose of waste properly: Take everything you bring with you. There are no trash bins on-site.
4. Leave what you find: Do not pick plants, move rocks, or disturb animal habitats.
5. Minimize campfire impacts: Fires are not permitted anywhere near the reservoir.
6. Respect wildlife: Observe from a distance. Do not feed or approach animals.
7. Be considerate of others: Keep noise low. This is a place of quiet reflection and scientific importance.

Respect Operational Security

The Upper Otay Reservoir is part of California’s critical water infrastructure. Even minor disruptions can trigger security protocols. Never attempt to climb fences, take aerial photos with drones, or approach gatehouses. These actions are not only dangerous but may trigger law enforcement response. Your curiosity is valid—but your responsibility is greater.

Support Water Conservation Year-Round

Touring the reservoir should inspire long-term action. Consider adopting water-saving habits:

• Install low-flow showerheads and faucet aerators
• Use drought-tolerant native plants in your landscaping
• Collect rainwater in barrels for garden use
• Report leaks in public or private infrastructure
• Advocate for water-efficient policies in your community

By connecting your visit to daily conservation, you amplify its impact far beyond a single day.

Engage in Environmental Education

If you are a teacher, parent, or student, use your tour as a springboard for learning. Create a classroom project, write a blog post, or produce a short documentary. The SDCWA offers free educational materials on water cycles, infrastructure, and conservation that can be downloaded from their website. Incorporate real data from Upper Otay’s annual water reports into math or science lessons.

Document Ethically

Photography is allowed, but only from designated areas. If you plan to publish your images online, avoid labeling them with exact GPS coordinates or security-sensitive details. Instead, describe the experience: “Sunrise over the Upper Otay Reservoir viewing platform—where water security meets natural beauty.” This protects the site while still sharing its value.

Tools and Resources

Official Resources

• San Diego County Water Authority (SDCWA): www.sdcwa.org – Primary source for tour schedules, educational materials, and water data.
• SDCWA Education Portal: www.sdcwa.org/education – Free lesson plans, videos, and interactive maps for students and educators.
• Upper Otay Reservoir Water Quality Reports: Available annually under “Water Quality & Monitoring” on the SDCWA site. Includes pH levels, turbidity, and contaminant data.
• California Department of Water Resources: water.ca.gov – Context on regional water systems and drought conditions.

Mapping and Navigation Tools

• Google Earth Pro: Use the historical imagery feature to see how the reservoir and surrounding landscape have changed over decades.
• AllTrails: Search for “Upper Otay Reservoir Viewpoint” to find user-submitted photos and trail conditions (note: no official trails exist beyond the viewing platform).
• USGS Topographic Maps: Download free 7.5-minute quadrangle maps for the Chula Vista and Otay Mesa area to understand elevation and watershed boundaries.

Books and Media

• “The Water Seekers” by Michael Hiltzik – A compelling narrative on California’s water history, including the development of reservoirs like Upper Otay.
• “Cadillac Desert” by Marc Reisner – A foundational text on water policy in the American West. Essential reading for understanding the broader context.
• Documentary: “Flow: For Love of Water” (2008) – Explores global water rights and infrastructure; highly relevant to reservoir management.
• Podcast: “The Water Report” by KQED – Weekly episodes on California water issues, often featuring SDCWA staff.

Mobile Apps

• MyWaterCalifornia: Real-time reservoir levels, rainfall data, and conservation tips for San Diego County residents.
• iNaturalist: Use this app to identify native plants and birds you observe during your tour. Contribute to citizen science databases.
• Weather Underground: Monitor microclimate conditions in the Otay region to plan your visit during optimal weather.

Volunteer and Advocacy Opportunities

After your tour, consider deepening your involvement:

• Join the SDCWA’s “Water Ambassador” program to speak at schools and community events.
• Participate in the “Adopt-a-Stream” initiative to monitor local waterways connected to the reservoir’s watershed.
• Attend public hearings on water infrastructure projects through the SDCWA’s Community Advisory Committee.

These opportunities turn passive observation into active stewardship.

Real Examples

Example 1: High School Environmental Science Class

In 2022, a biology teacher from Sweetwater Union High School District organized a field trip to the Upper Otay Reservoir for her AP Environmental Science class. After registering for a guided tour, students collected water quality data using portable test kits provided by SDCWA. Back in class, they compared the results to historical data and presented findings to the school board. Their project led to the installation of rainwater harvesting systems at two campus buildings. The teacher later received a state award for innovation in environmental education.

Example 2: Local Photographer Captures Seasonal Change

Photographer Maria Chen, a San Diego resident, visited the Upper Otay Reservoir during a spring tour in 2021. She returned six months later during a dry season to capture the contrast in water levels. Her photo series, “Echoes of Water,” was exhibited at the San Diego Central Library and later featured in the journal “Western Water & Culture.” Her work helped shift public perception of reservoirs from utilitarian structures to dynamic, living systems.

Example 3: Urban Planner Uses Data for Green Infrastructure

A city planner in Chula Vista used SDCWA’s public water yield reports from Upper Otay Reservoir to design a new green infrastructure project: a series of bioswales and permeable pavements in a flood-prone neighborhood. By modeling how the reservoir’s storage capacity affects downstream runoff, she secured $2.3 million in state funding. Her presentation included a photo from the viewing platform as a visual anchor.

Example 4: Retiree Becomes a Water Advocate

After attending a tour in 2020, retired engineer Robert Lin began writing monthly articles for his neighborhood newsletter explaining how reservoirs like Upper Otay help prevent water shortages. He created a simple infographic comparing reservoir levels over the past 20 years. His articles were so popular that the SDCWA invited him to co-host a public webinar on “Water Storage in a Changing Climate.”

Example 5: Student Research Project on Native Species

A UC San Diego undergraduate student studied the distribution of California sagebrush and coastal sage scrub near the Upper Otay Reservoir. Using iNaturalist data collected during a guided tour, she mapped plant density and correlated it with soil moisture levels from SDCWA sensors. Her thesis was published in the journal “Southern California Ecology Review” and later cited in a state water policy brief.

FAQs

Can I visit the Upper Otay Reservoir without a tour?

No. The reservoir is not open for casual public access. All visits must be through scheduled, authorized tours. Attempting to enter without permission is trespassing and may result in fines or legal consequences.

Are dogs allowed on the tour?

No. Pets are strictly prohibited on all SDCWA property, including the viewing area. This policy protects water quality and prevents disturbance to native wildlife.

Is the viewing platform wheelchair accessible?

Yes. The trail and observation platform are ADA-compliant, with paved surfaces and handrails. If you require additional accommodations, notify SDCWA at the time of registration.

How often are tours offered?

Tours are typically offered two to four times per year, depending on staffing, weather, and operational needs. They are not scheduled on a fixed calendar, so regular monitoring of the SDCWA website is essential.

Can I bring a drone to photograph the reservoir?

No. Drones are strictly prohibited without written authorization from SDCWA’s security and operations team. Even with permission, drone use is rarely approved due to safety and privacy concerns.

Is fishing allowed in the reservoir?

No. Fishing, swimming, and boating are not permitted. The reservoir is for water storage only, and introducing foreign substances could compromise water quality.

What should I do if the tour is canceled?

If a tour is canceled due to weather or operational reasons, SDCWA will notify you via email. You will be given the option to reschedule or receive a full refund of any registration fee (though most tours are free). Do not show up if you haven’t received confirmation.

Can I bring my children on the tour?

Yes, children are welcome, but all participants must be registered individually. Children under 12 must be accompanied by an adult at all times. The tour is suitable for ages 8 and up due to the length and informational content.

Is there parking available?

Yes. A small, designated parking area is provided at the viewing site. Parking is free, but spaces are limited. Carpooling is encouraged.

Can I take photos during the tour?

Yes, personal photography is permitted from the viewing platform. Commercial photography or filming requires a separate permit. Do not use tripods or drones unless explicitly authorized.

How do I get on the email list for tour announcements?

Visit the SDCWA website, scroll to the bottom of the homepage, and subscribe to their “Public Programs & Events” newsletter. You can also email education@sdcwa.org to request inclusion.

Conclusion

Touring the Upper Otay Reservoir is not about recreation—it is about revelation. It is an opportunity to witness the quiet, vital machinery of urban survival: the reservoirs, pipelines, and monitoring systems that deliver clean water to millions. Unlike the grandeur of Lake Tahoe or the recreational buzz of Lake Mead, Upper Otay offers something rarer: authenticity. It is a place where engineering meets ecology, where policy shapes landscape, and where every drop of water carries the weight of human responsibility.

This guide has provided you with the practical steps, ethical frameworks, and resources needed to experience the reservoir responsibly. But your journey doesn’t end when you leave the viewing platform. True understanding comes from action: conserving water at home, educating others, advocating for sustainable infrastructure, and honoring the unseen systems that sustain life.

As climate change intensifies and droughts become more frequent, reservoirs like Upper Otay will play an even more critical role. By learning how to tour it—not as a tourist, but as a steward—you become part of a broader movement to protect California’s water future. The next time you turn on a faucet, remember the journey that water took—from mountain snowmelt to aqueducts, from filtration plants to the quiet, guarded waters of Upper Otay.

Visit. Learn. Respect. Act. That is the true legacy of a tour.