Expanded Marine Protections in Glacier Bay (Effective June 28, 2025)
Overview
On June 28, 2025, Glacier Bay National Park and Preserve in Alaska introduced enhanced marine protection measures aimed at safeguarding the region’s feeding humpback whale population. These measures include reduced vessel speed limits and the designation of new temporary whale waters. They are part of the National Park Service’s dynamic management efforts to reduce the risk of whale-ship collisions and disturbance to marine wildlife.
What’s New
- 13-Knot Speed Limit:
A uniform 13-knot speed limit is now enforced in the entire Lower Bay Whale Waters. This replaces prior variable speed restrictions, bringing consistency to whale protection zones. - Two New Temporary Whale Waters:
- Lower West Arm & Whidbey Passage: Established due to the presence of over 25 feeding humpback whales.
- South Marble Island: In effect since June 13, 2025, protecting at least four feeding whales.
These zones are established in response to real-time data collected by NPS and marine wildlife monitors, reflecting the Park’s adaptive management approach.
Purpose of the Measures
- Collision Risk Reduction: Slower speeds significantly lower the chances of whale-vessel collisions, one of the primary threats to humpback whales.
- Minimizing Feeding Disruption: Speed limits and approach restrictions ensure whales can feed undisturbed during their summer migration.
- Legal Authority: Enforced under Title 36 of the Code of Federal Regulations, Subpart N, Section 13.1174.
Areas and Restrictions (Summary Table)
| Zone | Speed Limit | Trigger | Effective Date |
| Lower Bay (entire) | 13 knots | General whale presence | June 28, 2025 |
| Lower West Arm & Whidbey Passage | 13 knots | 25+ feeding humpbacks | June 28, 2025 |
| South Marble Island | 13 knots | 4+ feeding humpbacks | June 13, 2025 |
Compliance and Impact on Boaters
- Who Must Comply:
- Cruise ships (e.g., Holland America, Princess Cruises)
- Fishing charters
- Recreational vessels
- Mandatory Measures:
- Adhere to 13-knot limits in designated zones
- Stay at least 1 nautical mile from shore or follow mid-channel routes
- Avoid approaching whales within 1/4 nautical mile
- Enforcement:
- Enforced by NPS Rangers and U.S. Coast Guard
- Penalties include fines up to $5,000 and potential permit revocation
FAQs
Q1: Why 13 knots?
A: Studies show vessel strikes significantly decrease at speeds below 13 knots, especially in areas with poor visibility or high whale density.
Q2: Are kayaks included in the restrictions?
A: While the speed limit applies to motorized vessels, all crafts must follow approach restrictions to avoid disturbing whales.
Q3: How do I check current whale waters?
A: Call (907) 697-2627 or use marine VHF radio (KWM20 Bartlett Cove).
Q4: Will these zones change?
A: Yes. Zones are updated based on whale activity, often weekly.
Comparison with Previous Regulations
| Feature | Previous | New (June 28, 2025) |
| Lower Bay Speed Limit | Mixed: 13-20 knots | 13 knots uniformly |
| Temporary Whale Zones | Limited to South Marble Island | Expanded to West Arm & Whidbey |
| Monitoring | Periodic | Real-time, drone and acoustic-based |
| Enforcement | Light patrols | Active patrols + drones + penalties |
Summary
Glacier Bay National Park’s expanded marine protections mark a significant step toward proactive marine conservation. By enforcing speed limits and designated whale protection zones, the park aims to ensure that humpback whales can feed safely during their annual migration. These rules are legally binding and reflect an adaptive strategy based on real-time monitoring. All mariners are urged to comply to support whale conservation and public safety.
