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Mt. Jefferson, NH Trail Conditions and Information |
| Peak: | Mt. Jefferson |
| Elevation: | 5,712' |
| Popular Trails: |
Caps Ridge Trail
Castle Ravine Trail
Castle Trail
Jewell Trail
Six Husbands Trail
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| Water Crossings: | Routes involving Castle Ravine Trail, Castle Trail, and Six Husbands Trails may be difficult after rain or spring runoff. |
| Winter Access Notes: | Due to the seasonal closure of Jefferson Notch Road, as well as the danger posed by the nearby ravines, Mt. Jefferson is often climbed by the Jewell and Gulfside trails in winter. |
| Road Access Notes: | Jefferson Notch Road generally closes in November or December and reopens in May or June. The USFS Ammonoosuc/Jewell parking area closes in the winter, however there is often plowed parking available at the lower Cog parking lots. WMNF Road Status |
| Lists: | New England 4,000 Footers, New England 100 Highest, New Hampshire 4,000 Footers |
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Mt. Jefferson Conditions Reports by Month |
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January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December
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Most Recent Mt. Jefferson Conditions Reports |
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Peaks and Trails |
Date of Hike  |
Surface Conditions |
 | Mt. Jefferson
via Jewell Trail, Gulfside, Jefferson Loop | Thursday, Mar. 19
Uki | Ice - Black, Ice - Blue, Sno... | | | | Mt. Jefferson
via Jewell Trail, Gulfside, Jefferson Loop, Cog Rail Trail | Mar. 15, 2026
5 Lives & duracell- | Ice - Black, Snow - Unpacked... | | | | Mt. Jefferson
via Jewell Trail, Gulfside, Jefferson Loop | Mar. 5, 2026
arm | Snow - Packed Powder/Loose G... | | | | Mt. Jefferson
via Jewell Trail, Gulfside, Jefferson Loop | Feb. 22, 2026
Sue S | Snow - Packed Powder/Loose G... | | | | Mt. Adams, Mt. Jefferson, Mt. Madison
via Valley Way, Air Line, Gulfside | Feb. 22, 2026
JustRob | Snow - Packed Powder/Loose G... | | | | Mt. Jefferson
via Castle Trail, Randolph Path, Lowe’s Path | Feb. 19, 2026
Lara | Snow - Packed Powder/Loose G... | | | | Mt. Jefferson
via Jewell Trail, Gulfside, Jefferson Loop | Feb. 19, 2026
Uki | Snow - Packed Powder/Loose G... | | | | Mt. Monroe, Mt. Washington, Mt. Jefferson
via Ammonoosuc Ravine Trail, Monroe Loop, Crawford Path, Cog P... | Feb. 19, 2026
Sgt. Pepper AKA Professor... | Ice - Blue, Snow - Packed Po... | | | | Mt. Madison, Mt. Adams, Mt. Jefferson, Mt. Washing...
via Valley Way, Osgood Trail, Airline, Gulfside, Jefferson Loo... | Feb. 16, 2026
snowshoehare | Snow - Packed Powder/Loose G... | | | | Mt. Madison, Mt. Adams, Mt. Jefferson
via Valley Way, Osgood Trail, Gulfside, Israel Ridge Trail, Je... | Feb. 16, 2026
Heat Lightning | Ice - Blue, Snow - Packed Po... | | | | Mt. Jefferson
via Cog Rail Tral, Gulfside, Jefferson Loop, Jewell Trail, Jew... | Feb. 16, 2026
Chad | Snow - Packed Powder/Loose G... | | | | Mt. Jefferson
via Jewell Spur, Jewell Trail, Gulfside, Jefferson Loop | Feb. 15, 2026
MJo | Snow - Packed Powder/Loose G... | | | | Mt. Jefferson
via Cog Rail Trail, Gulfside, Jefferson Loop | Feb. 6, 2026
TransZenHiker | Ice - Blue, Snow - Packed Po... | | | | Mt. Monroe, Mt. Washington, Mt. Jefferson, Mt. Ada...
via Ammonoosuc Link, Ammonoosuc Ravine Trail, Crawford Path, M... | Feb. 6, 2026
Kyle L & E.T. Fudge | Ice - Blue, Snow - Packed Po... | | | | Mt. Jefferson
via Cog Rail Trail, snowfield, Gulfside, Jefferson Loop, Jewel... | Jan. 31, 2026
Krobis | Snow - Packed Powder/Loose G... | | | | Mt. Madison, Mt. Adams, Mt. Jefferson, Mt. Clay, M...
via Valley Way, Osgood Trail, Gulfside, Airline, Lowe’s Path... | Jan. 31, 2026
cmehike | Snow - Trace/Minimal Depth,... | | | | Mt. Jefferson
via Cog Rail Trail, Gulfside, Jefferson Loop | Jan. 31, 2026
HP | Snow - Unpacked Powder, Snow... | | | | Mt. Monroe, Mt. Washington, Mt. Jefferson, Mt. Ada...
via Ammonoosuc Ravine Trail, Monroe Loop, Crawford Path, Gulfs... | Jan. 31, 2026
jeffb.23 | Snow - Packed Powder/Loose G... | | | | Mt. Jefferson
via Cog Rail Trail, snowfields, Gulfside, Jefferson Loop, Jewe... | Jan. 31, 2026
Krobis | Snow - Packed Powder/Loose G... | | | | Mt. Jefferson, Mt. Washington
via Cog Rail Trail, Jewell Cutoff, Jewell Trail, Gulfside, Jef... | Jan. 10, 2026
Danielle, Monkey | Ice - Black, Ice - Blue, Sno... | | | | Mt. Jefferson, Mt. Adams
via Jewell Trail, Gulfside, Lowes Path, Gulfside, Valley Way | Dec. 13, 2025
Mikmcl | Ice - Blue, Snow - Packed Po... | | | | Mt. Jefferson
via Jewell Trail, Gulfside, Jefferson Loop, Cog Rail Trail | Dec. 3, 2025
Chief | Snow - Unpacked Powder, Snow... | | | | Mt. Jefferson
via Jewell Trail, Gulfside, Jefferson Loop | Nov. 22, 2025
Kyle L | Snow - Packed Powder/Loose G... | | | | Mt. Jefferson
via Caps Ridge Trail, Jefferson Loop, Gulfside, Spaulding Spri... | Nov. 15, 2025
Heat Lightning | Snow - Trace/Minimal Depth,... | | | | Mt. Jefferson
via Caps Ridge Trail | Nov. 2, 2025
Danielle, Monkey | Snow - Trace/Minimal Depth,... | | |
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