Michigan State Parks · Michigan
Porcupine Mountains – Union Bay
Michigan State Parks · Michigan, United States · in Porcupine Mountains Wilderness State Park
- Cost
- Modern 50-amp electric $46/night; Modern 20/30-amp electric $41/night
- Drinking water
- Yes
- Restrooms
- Yes
- Showers
- Yes
- Pets
- Yes
- Elevation
- 627 ft
- Dark sky
- Bortle class 1
- Cell coverage
- AT&T weak · Verizon weak · T-Mobile none (carriers' 4G LTE filings to the FCC, 2025-12; not measured here)
- Nearest town
- Carp Lake Township
- Phone
- 800-447-2757
- Activities
- Camping
About
A Michigan DNR campground at Porcupine Mountains. Reservable May 15 to October 31. Restroom/shower building: Available for all reservable season.
Weather, month by month
| Month | Typical high | Typical low | Coldest night | Hottest day | Years with a night below 32°F |
|---|---|---|---|---|---|
| January | 24° | 13° | -12° | 44° | 11 of 11 |
| February | 25° | 13° | -3° | 46° | 11 of 11 |
| March | 36° | 24° | 5° | 56° | 11 of 11 |
| April | 45° | 33° | 17° | 69° | 8 of 11 |
| May | 57° | 42° | 33° | 78° | 0 of 11 |
| June | 67° | 53° | 43° | 82° | 0 of 11 |
| July | 74° | 63° | 52° | 89° | 0 of 11 |
| August | 74° | 64° | 56° | 87° | 0 of 11 |
| September | 71° | 58° | 49° | 83° | 0 of 11 |
| October | 54° | 45° | 31° | 73° | 1 of 10 |
| November | 38° | 32° | 14° | 61° | 7 of 10 |
| December | 31° | 23° | 4° | 55° | 10 of 10 |
Mid-month figures from 2016–2026 of daily weather at this spot (ERA5 reanalysis via Open-Meteo, CC BY 4.0), in °F. Typical is the median; coldest and hottest are the extremes seen.
Nearby campgrounds
- Porcupine Mountains – Union River and White Pine Ext Outposts · Michigan State Parks · 2 mi
- Porcupine Mountains – Lost Creek Outpost · Michigan State Parks · 5 mi
- Porcupine Mountains – Backcountry Camping · Michigan State Parks · 10 mi
- Bergland Township Park Campground · City, County & Regional Parks · 16 mi · 20 sites
- Ontonagon Township Park Campground · City, County & Regional Parks · 17 mi
All public campgrounds in Michigan · Every state and province · Facts read from the operator 2026-09-17. Confirm fees, rules and current status with the operator before you go.