Plant Succession - Glacier Bay's Forest Timeline

Q: Will I actually be able to see the different plant stages from the boat?

Yes. Boat tours navigate inlets where you can observe bare glacier margins, yellow Dryas flowers, alder thickets, and mature Spruce forest in sequence. Distances vary from 100 feet to 1+ mile; binoculars help with observing pioneer plants.

Q: How long does plant succession actually take?

Lichens and Dryas appear within 0–5 years. Alder thickets establish in ~80 years. Sitka Spruce forest dominates after 200+ years. Glacier Bay's rapid retreat compresses what would take millennia into observable stages viewable in decades.

Q: Is this worth visiting if I'm not a botanist?

Yes—it's a profound visual story of transformation. Bare rock becomes forest. Ranger-led boat tours contextualize the succession, making it accessible to all visitors. The visual contrast alone is striking and memorable.

Q: Are bears a real concern, or is it exaggerated?

Both black and brown bears are present and active in summer. The 100-yard safety distance rule is strictly enforced. Boat tours maintain safe distances; serious incidents are rare, but awareness and caution are necessary.

Q: Can I hike into the early successional zones independently?

Limited independent access. The Forest Loop Trail near Bartlett Cove is accessible. Remote inlet zones may allow brief ranger-guided landings, but dense vegetation, bears, and unstable terrain restrict exploration. Always stay with guides in bear habitat.

Q: What if the weather is foggy or rainy?

Southeast Alaska rain is frequent and part of the authentic experience. Forest vegetation shows well in rain; glaciers remain visible even in clouds. Succession zones are observable in poor visibility. Postpone only for dangerous winds or severe storms.

Green plants and purple wildflowers cover a rocky hillside with a huge glacier and mountains behind.

Stand on terrain that glaciers abandoned just years ago—it's stark, raw, and unvegetated—then step into the adjacent forest, and you've time-traveled 200 years into the future. Lichens and small yellow Dryas flowers appear within years of glacier recession, nitrogen-fixing alder trees establish within 80 years, and dense Sitka Spruce forest dominates after two centuries. Glacier Bay's rapid glacial retreat offers visitors a rare chance to observe multiple stages of ecological succession in one location, a process that would take thousands of years to observe in more stable landscapes.

Access & viewing

GPS Coordinates: 58.88380205436216, -136.70677411932854
Accessibility: Dock viewing near Bartlett Cove accessible to most mobility levels; boat embarkation requires mobility to board vessel. Hiking into unimproved successional zones may present terrain challenges.

Conditions & safety

Permits Required: 0

Planning advice

Nearby Attractions: Bartlett Cove, Beardslee Islands, Johns Hopkins Glacier, Margerie Glacier, Grand Pacific Glacier, Muir Inlet, Geikie Inlet, Hemlock vs Spruce in Glacier Bay, Interstadial Stumps—Whidbey Passage
Nearby Facilities: Bartlett Cove Campground, Glacier Bay Visitor Information Station, Glacier Bay Lodge
Best Time To Visit: July, with clear weather and early morning departures (6–7am) for optimal light and wildlife activity
Tips Advice: Observe the visual progression side-by-side: bare glacier margins → yellow Dryas flowers → alder thickets → Sitka Spruce forest
Compare early and late successional zones from your boat—decades of growth differences visible in single tour
Look for pioneer lichens and Dryas flowers in bare silt zones; they colonize within years of glacier exposure
Listen for migratory warblers in alder thickets (May–June) and varied thrush songs in mature Spruce forest (summer)
Maintain 100-yard distance from bears; stay with tour guide and remain aboard vessels in bear habitat
Binoculars essential for observing pioneer plants and wildlife in early successional areas
Visit mid-week (Mon–Wed) for fewer boats and better wildlife viewing than weekend crowds
Insider Tips: Interstadial stumps visible at low tide near Bartlett Cove Beach—these are ancient tree remains from before glaciers advanced during the Little Ice Age
Alder thickets have a distinctly different smell than Spruce forest—notice the olfactory shift as you travel through succession zones
Early-succession zones (bare rock/Dryas) are chaotic and colonizing; late-succession (Spruce) is stable, quiet, and cool—the contrast is dramatic
Ask your boat tour guide to anchor briefly in early- and late-successional zones for side-by-side comparison of ground cover and plant density
Dryas flowers are small and sparse; use binoculars to observe. They're reliable indicators of 'new' land (< 5 years post-glacier recession)

More details

Park Area: Glacier Bay
Family Friendly Notes: Boat tours are family-friendly; children observe from protected decks. Cold weather exposure possible; bring layers. Life jackets required on all boats. Bears present—stay with tour guide; no independent exploration in remote areas. Children ages 4+ typically enjoy ranger-led educational tours.
Attraction Type: Ecological Succession Site
Elevation Feet: 0
Distance From Entrance: 50 miles from Gustavus, Alaska; 2-hour boat ferry from Gustavus to Bartlett Cove. No vehicle access; arrival by air or water only.
Accessibility Level: Boat or aircraft access required; dock viewing accessible to most; hiking into early successional zones involves unimproved terrain
How To Get There: Fly into Juneau, Alaska, then take a floatplane or drive/ferry to Gustavus (southeast of park). From Gustavus, board the Alaska Marine Highway ferry or hire a private boat to Glacier Bay Visitor Center at Bartlett Cove (2 hours). Most visitors join NPS ranger-led boat tours departing Bartlett Cove into various inlets where succession zones are visible.
Parking Availability: No vehicle parking; boat or aircraft arrival only
Road Type: N/A—water and air access only
Seasonal Access: Open year-round; visitor services and boat tours operate May through September, with peak season in July
Entry Fees: No entrance fee for park access
Main Features: Visible plant succession stages: pioneer lichens and Dryas flowers (0–5 years post-glacier recession); nitrogen-fixing alder thickets (80 years); mature Sitka Spruce forest with moss ground cover (200+ years)
What Youll See: Bare rock and gray silt near active glacier margins; delicate yellow Dryas flowers on exposed terrain; dense alder thickets with characteristic leaf structure; towering Sitka Spruce forest with thick moss carpeting and minimal undergrowth; wildlife at different succession stages (terns in early zones, warblers in alder, thrushes in forest)
Unique Characteristics: Compressed ecological timeline—observing plant succession stages that typically span millennia can be documented in a single boat tour. Glacier Bay glaciers are among the fastest-retreating in North America, creating a living laboratory for understanding post-glacial ecosystem recovery.
Safety Considerations: Bear country: both black and brown bears present; maintain 100-yard distance from bears. Cold water (hypothermia risk if immersed). Unpredictable Southeast Alaska weather (sudden winds, fog, storms). Limited cellular communication; evacuation by air may be required for serious injury. Terrain: slippery, unstable ground in early successional areas; uneven moss-covered rocks in mature forest.
Best Viewpoints: Boat tours through Johns Hopkins Inlet, Muir Inlet, and Geikie Inlet offer side-by-side views of different successional age zones; Bartlett Cove Beach provides viewing of nearby early and mid-successional stages
Photo Opportunities: Dramatic contrast between bare glaciated terrain and colonizing vegetation; yellow Dryas flowers against gray glacial silt; dense Spruce forest canopy; wildlife amid different succession stages (nesting terns, warblers in alder, seals at shorelines)
Photography Spots: Stark contrast shots: barren glacier margins vs. forested inlets. Golden light on yellow Dryas flowers (dawn/dusk). Canopy silhouettes in mature Spruce forest. Wildlife reflections: bears, seals, whales against glaciated backdrop.
Stargazing Quality: Poor in summer months (extended daylight at 58°N latitude—18+ hours of light in July); excellent in winter (long nights and clear cold air) but limited by seasonal access and weather challenges
Sunrise Sunset Quality: Extended daylight at high latitude (58°N); no traditional sunrise/sunset but golden light persists 4am–10pm in July, allowing all-day viewing and photography
Visitor Center Present: 1
Restrooms Available: 1
Restroom Type: Flush toilets at Glacier Bay Visitor Information Station; vault toilets at Bartlett Cove Campground
Picnic Areas: 0
Interpretive Signs: 1
Cell Service: Poor to absent; remote Southeast Alaska location with limited coverage
Water Available: 0
Guided Tours Available: 1
Trailheads Here: Forest Loop Trail near Bartlett Cove campground; informal hiking routes in early successional zones accessible from boat drops (with ranger guidance)
Connecting Trails: Forest Loop Trail system near Bartlett Cove; various inlet trails accessible via boat drops with ranger guidance
Nearby Services: Glacier Bay Lodge (Bartlett Cove), fuel, basic supplies at Gustavus, ranger services at Glacier Bay Visitor Information Station
Common Wildlife: Black bears, brown bears, moose, mountain goats, harbor seals, humpback whales, bald eagles, arctic terns, warblers, varied thrush, puffins
Best Wildlife Times: May–June for migratory warblers in alder thickets; June–July for insect activity and Dryas flower pollinators; summer (June–September) for marine mammals (whales, seals); July–August for nesting seabirds
Wildflower Peak: July (yellow Dryas flowers peak in early successional zones; other wildflowers bloom May–August)
Fall Colors Peak: September–October (alder leaves turn golden before dropping; Sitka Spruce remains evergreen)
Geological Formation Type: Glacial outwash plain; post-glacial successional ecosystem on recently deglaciated terrain
Scientific Interest: Plant succession is a core NPS research program at Glacier Bay. Pioneer lichens (Rhizocarpon) colonize bare rock. Dryas flowers (Dryas drummondii) appear in 0–5 years, stabilizing silt. Alder trees (Alnus crispa) establish in 80 years, fixing atmospheric nitrogen and enriching soil. Sitka Spruce (Picea sitchensis) dominates at 200+ years, creating shade and cooler microclimate. Visitors observe ecological succession models: facilitation (pioneers enable later species) and inhibition (shade-casting Spruce limits alder growth).
Road Opening Dates: N/A—no road access
Snow Lingering: High elevation snow (above 2,000ft) may persist into June; glacier recession exposes new terrain continuously year-round
Winter Access: Limited visitor services (most facilities closed Nov–April); accessible by air/boat but severe weather and daylight limitations challenge access
Best Visit Times: Early morning departures (6–7am) offer superior wildlife viewing and minimal boat traffic; mid-week (Mon–Wed) less crowded than weekends
Best Season: May through September; peak July
Weather Patterns: Southeast Alaska maritime climate: frequent rain, fog, and sudden wind gusts. Afternoon clouds develop most days. Visibility varies dramatically hour to hour. Pack waterproof gear; weather is part of the experience.
Peak Fill Times: Boat tours fill by 7–8am during peak July season; 6–7am in June and September
Busiest Season: July; June and August are secondary peaks
Fishing Species: Rainbow trout, Dolly Varden, coho salmon, pink salmon (seasonal availability varies by inlet)
Fishing Nearby: 1
Swimming Allowed: 0
Boating Allowed: 1
Climbing Areas: 0
Review Summary: Visitors typically leave with a deepened understanding of Glacier Bay as a global hotspot for rapid glacial recession and ecological recovery. Most appreciate the real-time plant succession timeline observable in a single boat tour; scientific interest runs high among educational groups and plant enthusiasts. Some find the ecological concepts abstract without ranger interpretation; guided tours are strongly recommended for context and safety.

Location

Frequently asked questions

Will I actually be able to see the different plant stages from the boat?

Yes. Boat tours navigate inlets where you can observe bare glacier margins, yellow Dryas flowers, alder thickets, and mature Spruce forest in sequence. Distances vary from 100 feet to 1+ mile; binoculars help with observing pioneer plants.

How long does plant succession actually take?

Lichens and Dryas appear within 0–5 years. Alder thickets establish in ~80 years. Sitka Spruce forest dominates after 200+ years. Glacier Bay's rapid retreat compresses what would take millennia into observable stages viewable in decades.

Is this worth visiting if I'm not a botanist?

Yes—it's a profound visual story of transformation. Bare rock becomes forest. Ranger-led boat tours contextualize the succession, making it accessible to all visitors. The visual contrast alone is striking and memorable.

Are bears a real concern, or is it exaggerated?

Both black and brown bears are present and active in summer. The 100-yard safety distance rule is strictly enforced. Boat tours maintain safe distances; serious incidents are rare, but awareness and caution are necessary.

Can I hike into the early successional zones independently?

Limited independent access. The Forest Loop Trail near Bartlett Cove is accessible. Remote inlet zones may allow brief ranger-guided landings, but dense vegetation, bears, and unstable terrain restrict exploration. Always stay with guides in bear habitat.

What if the weather is foggy or rainy?

Southeast Alaska rain is frequent and part of the authentic experience. Forest vegetation shows well in rain; glaciers remain visible even in clouds. Succession zones are observable in poor visibility. Postpone only for dangerous winds or severe storms.