0
Pull-thru
USFSTongass National Forest · Alaska
Big John Bay Cabin
Overview Big John Bay Cabin is located at the north end of Big John Bay in Rocky Pass (Keku Strait) on Kupreanof Island.
Sites1all reservable
Elev.20ft
Comf.May-Oct6 months
Max rigtents
Electricnonesites
From Juneau8h04real road time
The honest read
Synthesized from
RIDB · Open-Meteo
OSM · OSRM
Updated 2026-05-27
RIDB · Open-Meteo
OSM · OSRM
Updated 2026-05-27
At 20 ft, Big John Bay Cabin has a 6-month comfortable window (May-Oct). Winter nights average around 28°F, so the shoulder seasons turn cold fast. All 1 sites are reservable in advance, so plan ahead. Popular weekends book out. Within about 4 miles: lake or river access.
The campground at a glance
01 · CHARACTER
Reads strongest on shade and reservability. Softest on cool nights.
Six axes, each scored relative to every other federal campground in the region: quiet (miles to a major road), cool (elevation), roomy (average site spacing), shade, RV-fit (longest rig), and how reservable it is. All six come from data, nothing hand-tuned.
When to go
02 · CLIMATE
avg highavg lowfrost-freedriest · May
May-Oct
Comfortable window: nights stay above 35°F, days below 90°F.
55%
Of summer weekend-days are dry.
Apr 29
Last spring frost; first fall frost Oct 15.
52°F
Average July low.
Getting there
03 · ACCESS
01
Juneau
158 mi
8h04
02
Fairbanks
868 mi
29h58
03
Anchorage
984 mi
32h36
By drive time
Picking your site
04 · 1 SITES
0
Walk-in
0
50-amp
0
Accessible
0
Prime
1
Sites
What's within four miles
05 · TRAILS · PEAKS · WATER
Trails & Peaks
Trail segments
4
Water & Access
Lake / river access
yes
Method
We synthesize public data layers: RIDB and Recreation.gov facility and site records, Open-Meteo climate normals, OpenStreetMap roads, trails, and water, OSRM drive times, and USGS elevation. We take no bookings, no ads, and no paid placements. Independence is the entire point.