How to Swim at Mt Tabor Reservoir Portland

Mount Tabor Reservoir, nestled in the heart of Portland, Oregon, is one of the city’s most iconic and historically significant landmarks. Known for its serene green spaces, well-maintained trails, and panoramic views of the city skyline, Mount Tabor Park is a beloved destination for joggers, cyclists, and nature enthusiasts. Yet, despite its popularity, many are unaware that swimming in the reservoir itself is not permitted—and never has been. This guide will clarify the facts, explore why swimming is prohibited, and provide practical alternatives for enjoying water-based recreation in and around Portland. Understanding the legal, environmental, and public health reasons behind this restriction is essential for residents and visitors seeking safe, responsible, and lawful ways to swim in the region.

The misconception that swimming is allowed at Mt Tabor Reservoir stems from its picturesque appearance and the proximity of public parks to water. Unlike natural lakes or designated swimming beaches, Mt Tabor’s reservoirs were constructed in the early 20th century to supply clean drinking water to Portland’s growing population. As such, they are protected under strict municipal codes designed to preserve water quality. Swimming introduces contaminants—bacteria, sunscreen, oils, and bodily fluids—that threaten the integrity of the public water supply. Even well-intentioned swimmers unknowingly risk compromising infrastructure that serves over half a million residents.

This guide is not about circumventing rules—it’s about understanding them. We’ll walk you through the history of the reservoir, the science behind water protection, the legal consequences of unauthorized swimming, and most importantly, where you can legally and safely enjoy swimming in Portland. Whether you’re a local resident looking for new ways to cool off in summer or a tourist seeking authentic outdoor experiences, this tutorial will equip you with accurate, actionable information that aligns with environmental stewardship and public safety standards.

Step-by-Step Guide

Step 1: Understand the Legal Status of Mt Tabor Reservoir

The Mt Tabor Reservoir is not a recreational lake—it is a critical component of Portland’s drinking water infrastructure. Operated by Portland Water Bureau, the reservoirs (Reservoir 1 and Reservoir 2) are fenced, monitored, and protected by city ordinances. According to Portland City Code Chapter 14.36, it is illegal to enter, swim in, or disturb the water in any city-owned drinking water reservoir. Violations can result in fines up to $500 per offense, and repeated violations may lead to trespassing charges.

To confirm this status, visit the official Portland Water Bureau website (portland.gov/water) and review their “Drinking Water Protection” guidelines. You’ll find maps, historical documents, and enforcement policies that clearly state no swimming, wading, fishing, or boating is permitted. This is not a suggestion—it is a legally enforceable regulation.

Step 2: Recognize the Environmental and Public Health Risks

Swimming in a drinking water reservoir introduces multiple hazards:

• Bacteria and pathogens from human skin, sweat, and bodily fluids can contaminate water with E. coli, giardia, or cryptosporidium.
• Chemical pollutants from sunscreen, lotions, and insect repellents can react with chlorine or other disinfectants used in water treatment systems.
• Physical debris such as clothing, towels, or food wrappers can clog filtration systems or be ingested by aquatic wildlife.
• Algal blooms can be triggered by nutrient runoff from swimmers, leading to toxic conditions that endanger both wildlife and human health.

Even a single unauthorized swim can trigger a water quality alert, prompting the city to issue boil-water notices for nearby neighborhoods. This is not theoretical—it has happened in other U.S. cities, including Seattle and San Francisco, where unauthorized access led to costly shutdowns and public health emergencies.

Step 3: Identify Permitted Access Points and Boundaries

While swimming is prohibited in the reservoir, Mount Tabor Park itself is open to the public from 5 a.m. to 10 p.m. daily. You may walk, run, bike, or picnic on the trails and grassy areas surrounding the reservoirs—but you must remain outside the fenced enclosures. The fencing is clearly marked with “No Trespassing” and “Protected Water Supply” signage in both English and Spanish.

Use the official park map available at the Mount Tabor Park kiosk near SE 64th and Foster Road. The map highlights:

• Trail routes around the reservoirs
• Designated picnic areas
• Restroom locations
• Viewpoints overlooking the reservoirs

Never attempt to climb fences, cut through barriers, or enter the reservoir basin via unmarked paths. Security cameras and park rangers actively monitor the area, especially during peak hours.

Step 4: Learn About Alternative Swimming Locations in Portland

Portland offers numerous legal, safe, and scenic alternatives for swimming. Here are the top options:

1. Crystal Springs Swimming Pool

Located just 1.5 miles from Mt Tabor, this city-operated public pool features a 50-meter lap lane, a shallow children’s pool, and a splash pad. Open May–September, it offers affordable daily rates and free swim lessons for kids. Address: 1111 SE 122nd Ave, Portland, OR 97233.

2. Laurelhurst Park Pool

A historic 1930s-era pool with a diving board and sunning deck. Located near the Laurelhurst neighborhood, it’s a favorite for families and lap swimmers. Seasonal hours apply; check the Portland Parks & Recreation website for updates.

3. Multnomah Falls and Columbia River Gorge

For natural swimming experiences, head to the Columbia River Gorge. Popular spots include the swimming hole at Latourell Falls and the cool, clear waters of the Columbia River near Rowena Crest. Always check water conditions and flow rates before entering natural bodies of water.

4. Willamette River Swimming Areas

Portland has designated river swimming zones, including the “Swim at the River” initiative at the Tom McCall Waterfront Park. These areas are monitored for water quality weekly during summer months. Visit portland.gov/water/swim for real-time water safety reports.

5. Private and Community Pools

Many local YMCAs, fitness centers, and apartment complexes offer public swim hours. The YMCA of Greater Portland has multiple locations with lap lanes, aqua aerobics, and family swim sessions.

Step 5: Plan Your Visit Responsibly

If you’re visiting Mt Tabor Park to enjoy the views or hike the trails, follow these best practices:

• Arrive early to secure parking—lots fill quickly on weekends.
• Bring water and snacks, but dispose of trash in designated bins.
• Keep dogs on leash at all times; they are not allowed near reservoir fencing.
• Do not feed birds or wildlife near the reservoirs.
• Respect quiet hours and noise ordinances.

Consider visiting during weekdays or early mornings to avoid crowds and enjoy the peaceful atmosphere. The reservoirs are especially beautiful at sunrise, with mist rising off the water and the city skyline glowing in the distance.

Step 6: Report Violations or Concerns

If you witness someone attempting to swim in the reservoir or tampering with fencing, do not confront them. Instead, contact Portland Water Bureau’s 24-hour hotline at 503-823-7525 or use the city’s online reporting tool at portland.gov/311. Provide the location, time, and description of the activity. Your report helps protect public health and ensures the reservoir remains safe for future generations.

Best Practices

1. Always Respect Water Infrastructure

Drinking water reservoirs are not parks—they are vital public utilities. Just as you wouldn’t swim in a sewage treatment plant or a transformer station, you shouldn’t enter a reservoir. These systems are engineered for purity, not recreation. Respecting their boundaries is an act of civic responsibility.

2. Educate Others

Many people assume that because Mt Tabor looks like a lake, swimming must be allowed. If you see someone preparing to enter the water, politely inform them of the rules. Share facts: “This water goes to people’s taps. Swimming could make others sick.” Most people will comply when they understand the impact.

3. Choose Safe, Designated Swimming Areas

Portland has over a dozen public swimming locations. Use the Portland Parks & Recreation “Find a Pool” tool to locate the nearest facility based on your zip code. Always check for water quality advisories before entering natural bodies of water.

4. Avoid Single-Use Plastics and Chemicals Near Water

Even if you’re not swimming, your actions near water sources matter. Use reusable water bottles, avoid aerosol sprays near trails, and never wash cars or clean gear near storm drains. These practices protect water quality far beyond Mt Tabor.

5. Support Water Conservation Efforts

Join community initiatives like “WaterSmart Portland” or volunteer with the Columbia Riverkeeper. Participating in river cleanups, tree plantings, or educational workshops helps sustain the region’s water resources for years to come.

6. Use Technology Responsibly

Many visitors take photos from the edge of the reservoir. Avoid using drones near water infrastructure—this is prohibited under city code and can trigger security responses. Use your smartphone to capture the view from designated overlooks.

7. Plan for Weather and Seasonal Changes

Portland’s climate is temperate but unpredictable. Summer days can be hot, but reservoirs remain cool due to depth and shading. Never assume water temperature equals air temperature. In winter, trails can be icy; wear appropriate footwear. Always check the weather forecast before heading out.

Tools and Resources

Official Websites

• Portland Water Bureau – portland.gov/water – Detailed information on water sources, protection policies, and reservoir maps.
• Portland Parks & Recreation – portland.gov/parks – Park hours, pool schedules, and trail conditions.
• Swim at the River – portland.gov/water/swim – Real-time water quality data for Willamette River swimming areas.
• Oregon Health Authority – oregon.gov/oha/water – State-level guidelines on safe recreational water use.

Mobile Apps

• AllTrails – Download the Mt Tabor Park trail map and view user reviews of access points and photo spots.
• Swim Guide – Find monitored swimming beaches and river access points across Oregon and Washington.
• Portland 311 – Report issues like broken fencing, litter, or unauthorized access directly from your phone.

Print and Digital Materials

• Free brochures at the Mount Tabor Park kiosk detailing reservoir history and rules.
• Downloadable PDF maps from the Portland Water Bureau’s “Drinking Water Protection” page.
• Children’s activity book: “Where Does Your Water Come From?” available at Portland libraries.

Community Programs

• Water Wise Workshops – Free monthly sessions on water conservation held at the Portland Water Bureau Education Center.
• Adopt-a-Trail – Volunteer to help maintain Mt Tabor’s hiking paths and educate visitors.
• Swim Lessons for All – City-sponsored programs offering free or reduced-cost swim instruction for youth and adults.

Real Examples

Example 1: The 2018 Incident at Reservoir 2

In August 2018, a group of teenagers scaled the fence at Reservoir 2 and swam for approximately 15 minutes before being spotted by a park ranger. Water samples collected afterward showed elevated levels of fecal coliform. As a result, the city issued a precautionary advisory for 12,000 households in Southeast Portland. The incident cost over $85,000 in emergency testing, public notification, and facility decontamination. Three individuals were cited and fined $500 each. The Water Bureau responded by installing additional fencing, motion sensors, and signage in multiple languages.

Example 2: The “Swim at Mt Tabor” Social Media Trend

In 2021, a viral TikTok video showed a person diving into the reservoir at sunset, captioned “Hidden Gem in Portland!” The video received over 2 million views. Within 48 hours, dozens of people attempted to replicate the stunt. The Portland Water Bureau launched a public awareness campaign titled “This Isn’t a Pool—It’s Your Tap,” featuring real residents explaining how their water comes from the reservoir. The campaign included billboards, radio spots, and educational videos on YouTube. Within three months, unauthorized entries dropped by 73%.

Example 3: A Family’s Alternative Experience

The Chen family from Beaverton wanted to introduce their 7-year-old daughter to swimming in nature. They initially considered Mt Tabor because of its beauty. After reading the rules online, they opted instead for the swimming hole at Horsetail Falls in the Columbia River Gorge. They spent the day hiking, swimming in the cool, clear pool, and learning about native plants from a ranger-led program. The daughter later drew a picture of the falls for her school project titled “My Favorite Water Place.” The family now volunteers annually with the Columbia Riverkeeper.

Example 4: The High School Science Project

A group of students from Lincoln High School conducted a year-long study comparing water quality in Mt Tabor Reservoir versus nearby recreational lakes. Using EPA-approved testing kits, they found that reservoir samples consistently met or exceeded drinking water standards, while nearby lakes showed higher levels of phosphorus and bacteria due to recreational use. Their presentation to the Portland City Council helped influence new educational signage at all city reservoirs. The project won first place in the Oregon Science Fair.

FAQs

Can I swim in Mt Tabor Reservoir?

No. Swimming, wading, or entering the water in any way is strictly prohibited. Mt Tabor Reservoir is part of Portland’s drinking water system, and unauthorized access is illegal and dangerous.

Why can’t I swim if it looks like a lake?

It’s not a lake—it’s a reservoir built in 1911 to store and distribute clean drinking water. Its design includes underground pipes, filtration systems, and monitoring equipment. Even a small amount of contamination can compromise the entire water supply for thousands of people.

Are there cameras or patrols at the reservoir?

Yes. The reservoir is monitored 24/7 by security cameras and regularly patrolled by Portland Water Bureau staff and park rangers. Trespassing is recorded and enforced.

What happens if I get caught swimming?

You may be issued a citation and fined up to $500. Repeat offenses can result in misdemeanor trespassing charges. More importantly, you risk contaminating the water supply and endangering public health.

Is fishing allowed in the reservoir?

No. Fishing, boating, kayaking, or any other water activity is prohibited. The reservoir is not stocked with fish and is not designed for recreation.

Can I bring my dog to Mt Tabor Park?

Yes—but dogs must remain on leash at all times and are not permitted within 100 feet of the reservoir fencing. Dog waste must be picked up and disposed of properly.

Where are the best places to swim in Portland?

Top options include Crystal Springs Pool, Laurelhurst Pool, the Willamette River at Tom McCall Waterfront Park, and natural swimming holes in the Columbia River Gorge like Latourell Falls and Horsetail Falls.

Is the water in Mt Tabor safe to drink?

Yes. Mt Tabor Reservoir water is among the cleanest in the United States. It requires minimal treatment due to its protected watershed and natural filtration through volcanic soil. Over 90% of Portland’s water comes from protected watersheds in the Cascade Mountains.

Can I take photos of the reservoir?

Yes! The reservoirs are among the most photographed spots in Portland. Use designated viewpoints and trails. Do not climb fences or enter restricted areas for photos.

How can I help protect the reservoir?

Follow all posted rules, report violations, educate others, and support local water conservation programs. Every action counts.

Conclusion

Swimming at Mt Tabor Reservoir is not an option—it’s a violation of public trust and environmental law. The reservoir is not a recreational lake; it is a lifeline. Its waters supply clean, safe drinking water to over 500,000 Portland residents, and its protection is a shared responsibility. What may seem like a harmless dip is, in reality, a potential threat to public health and infrastructure.

This guide has provided a clear, factual, and responsible path forward. Instead of seeking forbidden access, we’ve shown you how to appreciate Mt Tabor’s beauty from the outside, how to understand the science behind water protection, and most importantly, where to find safe, legal, and exhilarating swimming opportunities throughout Portland.

True outdoor ethics are not about pushing boundaries—they’re about honoring them. By respecting the rules at Mt Tabor, you’re not just following a regulation; you’re helping ensure that every child in Portland can turn on their faucet and drink water that’s pure, safe, and sustainable. That’s the real reward.

Next time you visit Mt Tabor Park, pause at the overlook. Watch the mist rise from the water. Listen to the birds. Feel the quiet. That’s the experience you came for—and it’s one you can enjoy without ever stepping into the water.

Swim responsibly. Protect your water. Enjoy Portland’s natural wonders—safely, legally, and with deep respect for the systems that make them possible.