I have not seen this posted anywhere else (of course, I may have missed it), here is the spring football schedule:
http://www.gophersports.com/sports/m-footbl/spec-rel/020316aac.html
Minnesota Football Spring Practice Dates
March 1 -- Practice 1 (Closed to the public and media)
March 3 -- Practice 2 (Closed to the public and media)
March 5 -- Practice 3 (Closed to the public and media)
March 8 -- Practice 4 (Closed to the public and media)
March 10 at 3:45 p.m. -- Practice 5, Gibson-Nagurski Football Complex (Open to the public and media)
March 22 -- Practice 6 (Closed to the public and media)
March 24 at 3:45 p.m. -- Practice 7, Gibson-Nagurski Football Complex (Open to the public and media)
March 26 at 9:45 a.m. -- Practice 8, Gibson-Nagurski Football Complex (Open to the public and media)
March 29 -- Practice 9 (Closed to the public and media)
March 31 at 3:45 p.m. -- Practice 10, Gibson-Nagurski Football Complex (Open to the public and media)
April 2 at 11 a.m. -- Practice 11, Gibson-Nagurski Football Complex (Open to the public and media)
April 5 -- Practice 12 (Closed to the public and media)
April 7 at 3:45 p.m. -- Practice 13, Gibson-Nagurski Football Complex (Open to the public and media)
April 8 -- Practice 14 (Closed to the public and media)
April 9 at 12:45 p.m. -- Spring Game, TCF Bank Stadium
All dates, locations and availability are subject to change