The 1A classification marched onto the Colorado high school track and field scene in 2011. A few records still hang around from that year, but they're getting a little harder to find with each passing year. I've listed below the records for the 1A classification. The state meet records are listed in all cases, but if a better mark exists from a rankings meet outside of the state meet, I've listed that as well.
1A Classification Records
Boys
100 Meter Dash - Gabe Longworth, McClave, 11.19 (+0.8), 2013
200 Meter Dash - Clay Russell, North Park, 22.32 (+0.7), 2014
400 Meter Dash - Clay Russell, North Park, 49.00, 2014
800 Meter Run - Erick Enriquez-Acosta, Idalia, 1:57.86, 2015
1600 Meter Run - Ryan Dollerschell, Prairie, 4:42.07, 2014
3200 Meter Run - Bryce Grahn, South Baca, 10:14.47, 2014
110 Meter Hurdles - Landry Cogburn, Walsh, 14.57 (-2.0), 2011
300 Meter Hurdles - Landry Cogburn, Walsh, 38.73, 2011
4x100 Meter Relay - Pikes Peak Christian (Michael Braithwaite, Seeon Kim, Christian Strozier, Mark Waters), 43.93, 2015
4x200 Meter Relay - Springfield (Evan Waters, Justin Self, Rafe Hutches, Justin Krieger), 1:33.25, 2015
4x400 Meter Relay - Walsh (Alley, Stafford, England, Cogburn), 3:29.68, 2011
4x800 Meter Relay - Holly (Darnell, Nelson, Tarango, Rushton), 8:35.51, 2012
1A All-Time Best: Holly (Darnell, Nelson, Tarango, Rushton), 8:34.79 @ 1A Invitational, 2012, Limon
Shot Put - Caleb Smith, Pikes Peak Christian, 50-5.00, 2011
Discus - Andrew Perry, Otis, 170-7, 2012
Pole Vault - Mack Cooper, Vail Christian, 13-6.00, 2013
High Jump - Chase Langley, Plateau Valley, 6-2.00, 2011
1A All-Time Best: Ross Dunlap, Springfield, 6-5 @ Holly Invitational, Holly, 2015
Long Jump - Kyle English, Stratton, 21-10.5 (+0.0), 2014
1A All-Time Best: Kyle English, Stratton, 21-10.75 (+0.7) @ Elbert Invitational, Elbert, 2014
Triple Jump - Kyle English, Stratton, 43-10.25 (-1.0), 2013
1A All-Time Best: Kyle English, Stratton, 43-11 (+1.8) @ Kiowa Klassic, Elbert, 2014
Girls
100 Meter Dash - Zariah Mason, Kim, 12.72, (-1.5), 2015
1A All-Time Best: Zariah Mason, Kim, 12.69 (-0.4) @ Tri League Meet, Holly, 2015
200 Meter Dash - Ashley Atkin, Fleming, 26.62 (+1.5), 2011
1A All-Time Best: Zariah Mason, Kim, 26.20 (-1.1) @ La Junta Open, La Junta, 2015
400 Meter Dash - Ginger Hutton, Shining Mountain Waldorf, 57.89, 2015
800 Meter Run - Ginger Hutton, Shining Mountain Waldorf, 2:12.81, 2015
1600 Meter Run - Birdie Hutton, Shining Mountain Waldorf, 5:12.82, 2012
1A All-Time Best: Birdie Hutton, Shining Mountain Waldorf, 5:03.76 @ Mullen Runners Roost, 2012, Denver
3200 Meter Run - Birdie Hutton, Shining Mountain Waldorf, 11:49.83, 2012
1A All-Time Best: Birdie Hutton, Shining Mountain Waldorf, 11:18.56 @ Windsor Invitational, 2012
100 Meter Hurdles - Logan Franek, Elbert, 15.95 (+2.0), 2012
1A All-Time Best, Logan Franek, Elbert, 15.87 (+0.9) @ Black Forest League Championships, Elbert, 2013
300 Meter Hurdles - Corissa Guynes, Dove Creek, 47.10, 2013
4x100 Meter Relay - Vail Christian (Alexander, McCormick, Smith, Curry) 51.99, 2013
4x200 Meter Relay - Idalia (Cano, Mooney, Shaffer, Schafer), 1:49.72, 2013
4x400 Meter Relay - Merino (Conger, Lindvall, Schmidt, Rinaldo), 4:13.64, 2011
4x800 Meter Relay - Merino (Walser, Schmidt, Michel, Kindvall), 10:28.68, 2011
1A All-Time Best: Shining Mountain Waldorf (Sarrah Claman, Ginger Hutton, Emma Shaefer, Paisley Sheehan), 10:01.80 @ Mile High League Meet, Longmont, 2015
800 Sprint Medley Relay - Plateau Valley (Savannah Turner, Kaelyn Dennis, Laura Green, Audrey Rose Kachin), 1:53.90, 2015
Shot Put - Jenna McKinley, Sangre de Cristo, 41-8.5, 2015
1A All-Time Best: Eboni Nash, Eads, 42-5 @ Longhorn Invitational, Springfield, 2015
Discus - Brooke Lenox, Eads, 117-0, 2015
1A All-Time Best: Eboni Nash, Eads, 124-5 @ La Junta Open, La Junta, 2015
Pole Vault - Taylor Alexander, Vail Christian, 11-8.0, 2014
High Jump - Morgan Howard, Cheyenne Wells, 5-3.5, 2014
1A All-Time Best: Morgan Howard, Cheyenne Wells, 5-4 @ Holly Invitational, Holly, 2014
Long Jump - Sarah Storey, Sangre de Cristo, 16-10 (+1.8), 2015
1A All-Time Best: Sarah Storey, Sangre de Cristo, 17-1.5 (+1.0) @ High Altitude Championships, Alamosa, 2015
Triple Jump - Jenna Zink, Caliche, 34-2.75 (-3.2), 2013
1A All-Time Best: Sarah Storey, Sangre de Cristo, 35-2 (0.0) @ IML/SPL Meet, Monte Vista, 2015