J-Line
- 0.4 mi
- round trip
- 125 ft
- climb
- Singletrack
- surface
- Out and back
- route
- Apr, Jun–Oct
- best months
J-Line is a short, out-and-back mountain biking route in Wisconsin, about 1.5 miles from the town of Union. The climb is gentle, with a total gain of 125 feet over a round trip of about 0.88 miles, and the high point sits at 1,005 feet. The route starts at roughly 952 feet, and the steepest stretch comes within the first 0.05 miles, with an 8% grade. Summer is the most comfortable time to ride. Typical averages from a nearby weather station in Eau Claire show July highs around 83°F with lows near 60°F, while winter highs stay in the 20s. The route sits among a cluster of other trails. Barb Wire and Midline are each about 0.1 mile away, and Free Willy is a similar distance. For climbing, Mt. Simon is about a mile off.
Best time to go · Apr, Jun–Oct
Best time to visit J-Line
Best months: April and June–October. Best months have typical highs of 55–85 °F, lows of 30 °F or warmer (32 °F where the station doesn't record snow), at most one snowy day and no more than 12 wet days.
Jan
23° / 6°
10 wet
Feb
28° / 9°
8 wet
Mar
41° / 21°
10 wet
Apr
56° / 33°
12 wet
May
70° / 45°
13 wet
Jun
79° / 55°
12 wet
Jul
83° / 60°
12 wet
Aug
80° / 58°
11 wet
Sep
72° / 49°
11 wet
Oct
58° / 37°
10 wet
Nov
42° / 25°
9 wet
Dec
29° / 13°
10 wet
Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Eau Claire Rgnl Ap, WI, 2.1 mi away at 885 ft. This station doesn't record snowfall. Source: NOAA NCEI U.S. Climate Normals 1991–2020.
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Map and trail data © OpenStreetMap contributors
