Ashton Reservoir

Flows into the Henrys Fork Snake River

  • Recommended Fishing Water
  • Family Fishing Water

Ashton Reservoir in Fremont County is 371.6 acres.

A scenic 400 acre reservoir on the Henrys Fork, Ashton Reservoir is known for rainbow trout and is also home to the state record brown trout. Fish from the fishing dock at the access site, from shore, or from watercraft.

Facilities

Motor Restriction
No
Boat Ramp
Yes
Dock
Yes
Toilet
Handicap Accessible
Campground
No
ADA Access
Handicap Accessible

Directions

Travel north on US Highway 20, past the town of Ashton. Immediately after crossing the Henrys Fork, turn left and travel about 0.4 mile to the Ashton Reservoir access site. 

Recommended Game Fish

Species Observed in Surveys

Fish Stocking Records

Date Species Quantity General Size
2022/04/20 Rainbow Trout 38,955 Greater than 6 inches
2021/04/27 Rainbow Trout 22,353 Greater than 6 inches
2021/04/26 Rainbow Trout 16,424 Greater than 6 inches
2020/04/29 Rainbow Trout 22,472 Greater than 6 inches
2020/04/28 Rainbow Trout 17,136 Greater than 6 inches
2019/04/16 Rainbow Trout 24,121 Greater than 6 inches
2019/04/15 Rainbow Trout 15,960 Greater than 6 inches
2018/06/19 Rainbow Trout 6,600 Greater than 6 inches
2018/06/18 Rainbow Trout 32,151 Greater than 6 inches
2017/06/27 Rainbow Trout 12,917 Greater than 6 inches
2017/05/31 Rainbow Trout 12,915 Greater than 6 inches
2017/05/02 Rainbow Trout 12,919 Greater than 6 inches
2016/07/07 Rainbow Trout 12,300 Greater than 6 inches
2016/06/06 Rainbow Trout 13,020 Greater than 6 inches
2016/06/01 Rainbow Trout 800 Greater than 6 inches
2016/05/06 Rainbow Trout 12,653 Greater than 6 inches
2015/07/29 Rainbow Trout 11,350 Greater than 6 inches
2015/06/22 Rainbow Trout 13,700 Greater than 6 inches
2015/05/21 Rainbow Trout 700 Greater than 6 inches
2015/05/14 Rainbow Trout 13,000 Greater than 6 inches
2014/10/31 Rainbow Trout 400 Greater than 6 inches
2014/06/25 Rainbow Trout 13,400 Greater than 6 inches
2014/06/04 Rainbow Trout 11,600 Greater than 6 inches
2014/05/01 Rainbow Trout 16,771 Greater than 6 inches
2013/06/24 Rainbow Trout 400 Greater than 6 inches
2013/06/11 Rainbow Trout 28,930 Greater than 6 inches
2013/05/24 Rainbow Trout 3,875 Greater than 6 inches
2013/05/02 Rainbow Trout 7,750 Greater than 6 inches
2010/08/16 Rainbow Trout 1,750 Greater than 6 inches
2010/08/02 Rainbow Trout 3,375 Greater than 6 inches
2010/07/19 Rainbow Trout 3,510 Greater than 6 inches
2010/07/06 Rainbow Trout 3,450 Greater than 6 inches
2010/06/21 Rainbow Trout 3,450 Greater than 6 inches
2010/06/01 Rainbow Trout 3,440 Greater than 6 inches
2010/05/17 Rainbow Trout 3,460 Greater than 6 inches
2010/05/10 Rainbow Trout 3,600 Greater than 6 inches
2010/04/12 Rainbow Trout 6,133 Greater than 6 inches
2009/11/20 Rainbow Trout 990 Greater than 6 inches
2009/09/01 Rainbow Trout 7,125 Greater than 6 inches
2009/08/18 Rainbow Trout 3,640 Greater than 6 inches
2009/08/03 Rainbow Trout 3,440 Greater than 6 inches
2009/07/21 Rainbow Trout 3,080 Greater than 6 inches
2009/07/06 Rainbow Trout 3,447 Greater than 6 inches
2009/06/24 Rainbow Trout 3,625 Greater than 6 inches
2009/06/02 Rainbow Trout 3,450 Greater than 6 inches
2009/05/18 Rainbow Trout 3,450 Greater than 6 inches
2009/04/22 Rainbow Trout 3,402 Greater than 6 inches
2008/09/16 Rainbow Trout 2,805 Greater than 6 inches
2008/08/28 Rainbow Trout 4,349 Greater than 6 inches
2008/08/18 Rainbow Trout 3,237 Greater than 6 inches
2008/08/05 Rainbow Trout 3,470 Greater than 6 inches
2008/07/22 Rainbow Trout 3,480 Greater than 6 inches
2008/07/08 Rainbow Trout 3,195 Greater than 6 inches
2008/06/24 Rainbow Trout 3,437 Greater than 6 inches
2008/06/06 Rainbow Trout 3,430 Greater than 6 inches
2008/05/23 Rainbow Trout 3,474 Greater than 6 inches
2008/05/05 Rainbow Trout 3,525 Greater than 6 inches
2007/09/06 Rainbow Trout 7,041 Greater than 6 inches
2007/08/28 Rainbow Trout 3,450 Greater than 6 inches
2007/08/15 Rainbow Trout 1,080 Greater than 6 inches
2007/08/06 Rainbow Trout 4,006 Greater than 6 inches
2007/07/25 Rainbow Trout 1,748 Greater than 6 inches
2007/07/09 Rainbow Trout 3,447 Greater than 6 inches
2007/06/29 Rainbow Trout 3,456 Greater than 6 inches
2007/06/07 Rainbow Trout 3,280 Greater than 6 inches
2007/05/22 Rainbow Trout 3,439 Greater than 6 inches
2007/05/08 Rainbow Trout 3,430 Greater than 6 inches
2006/10/04 Rainbow Trout 1,430 Greater than 6 inches
2006/09/26 Rainbow Trout 2,072 Greater than 6 inches
2006/09/14 Rainbow Trout 3,135 Greater than 6 inches
2006/09/13 Rainbow Trout 3,237 Greater than 6 inches
2006/08/28 Rainbow Trout 3,442 Greater than 6 inches
2006/08/10 Rainbow Trout 3,229 Greater than 6 inches
2006/07/27 Rainbow Trout 3,438 Greater than 6 inches
2006/07/10 Rainbow Trout 3,480 Greater than 6 inches
2006/06/28 Rainbow Trout 3,406 Greater than 6 inches
2006/06/09 Rainbow Trout 3,484 Greater than 6 inches
2006/05/22 Rainbow Trout 4,174 Greater than 6 inches
2005/09/14 Rainbow Trout 6,973 Greater than 6 inches
2005/08/31 Rainbow Trout 3,433 Greater than 6 inches
2005/08/08 Rainbow Trout 3,425 Greater than 6 inches
2005/07/27 Rainbow Trout 3,430 Greater than 6 inches
2005/07/11 Rainbow Trout 3,324 Greater than 6 inches
2005/07/01 Rainbow Trout 3,435 Greater than 6 inches
2005/06/20 Rainbow Trout 3,461 Greater than 6 inches
2005/05/26 Rainbow Trout 3,456 Greater than 6 inches
2005/05/10 Rainbow Trout 3,448 Greater than 6 inches
2004/09/09 Rainbow Trout 6,868 Greater than 6 inches
2004/08/17 Rainbow Trout 3,437 Greater than 6 inches
2004/08/03 Rainbow Trout 3,393 Greater than 6 inches
2004/07/20 Rainbow Trout 3,550 Greater than 6 inches
2004/07/08 Rainbow Trout 3,442 Greater than 6 inches
2004/06/30 Rainbow Trout 3,454 Greater than 6 inches
2004/06/08 Rainbow Trout 3,434 Greater than 6 inches
2004/05/27 Rainbow Trout 3,445 Greater than 6 inches
2004/05/13 Rainbow Trout 3,402 Greater than 6 inches
2003/09/29 Rainbow Trout 3,288 Greater than 6 inches
2003/09/09 Rainbow Trout 3,445 Greater than 6 inches
2003/08/19 Rainbow Trout 3,442 Greater than 6 inches
2003/08/07 Rainbow Trout 3,666 Greater than 6 inches
2003/07/28 Rainbow Trout 871 Greater than 6 inches
2003/07/22 Rainbow Trout 2,563 Greater than 6 inches
2003/07/08 Rainbow Trout 3,443 Greater than 6 inches
2003/06/27 Rainbow Trout 819 Greater than 6 inches
2003/06/24 Rainbow Trout 2,622 Greater than 6 inches
2003/06/10 Rainbow Trout 3,308 Greater than 6 inches
2003/05/27 Rainbow Trout 3,438 Greater than 6 inches
2003/05/13 Rainbow Trout 3,432 Greater than 6 inches
2002/09/23 Rainbow Trout 2,646 Greater than 6 inches
2002/09/11 Rainbow Trout 2,808 Greater than 6 inches
2002/08/28 Rainbow Trout 2,700 Greater than 6 inches
2002/08/13 Rainbow Trout 2,723 Greater than 6 inches
2002/07/24 Rainbow Trout 2,805 Greater than 6 inches
2002/07/09 Rainbow Trout 2,747 Greater than 6 inches
2002/06/25 Rainbow Trout 2,750 Greater than 6 inches
2002/06/13 Rainbow Trout 2,744 Greater than 6 inches
2002/05/30 Rainbow Trout 2,762 Greater than 6 inches
2002/05/15 Rainbow Trout 2,832 Greater than 6 inches
2001/09/21 Rainbow Trout 1,755 Greater than 6 inches
2001/09/14 Rainbow Trout 1,800 Greater than 6 inches
2001/09/05 Rainbow Trout 1,980 Greater than 6 inches
2001/08/21 Rainbow Trout 2,747 Greater than 6 inches
2001/08/07 Rainbow Trout 2,714 Greater than 6 inches
2001/07/26 Rainbow Trout 2,744 Greater than 6 inches
2001/07/11 Rainbow Trout 1,942 Greater than 6 inches
2001/06/21 Rainbow Trout 2,754 Greater than 6 inches
2001/06/06 Rainbow Trout 2,760 Greater than 6 inches
2001/05/30 Rainbow Trout 799 Greater than 6 inches
2001/05/23 Rainbow Trout 2,756 Greater than 6 inches
2001/05/09 Rainbow Trout 2,758 Greater than 6 inches
2000/09/06 Rainbow Trout 5,069 Greater than 6 inches
2000/08/22 Rainbow Trout 3,360 Greater than 6 inches
2000/08/08 Rainbow Trout 2,752 Greater than 6 inches
2000/07/18 Rainbow Trout 2,610 Greater than 6 inches
2000/07/05 Rainbow Trout 2,777 Greater than 6 inches
2000/06/26 Rainbow Trout 2,646 Greater than 6 inches
2000/06/13 Rainbow Trout 2,728 Greater than 6 inches
2000/05/24 Rainbow Trout 2,772 Greater than 6 inches
2000/05/04 Rainbow Trout 2,790 Greater than 6 inches
1999/09/22 Rainbow Trout 1,104 Greater than 6 inches
1999/09/20 Rainbow Trout 2,700 Greater than 6 inches
1999/09/10 Rainbow Trout 2,750 Greater than 6 inches
1999/08/24 Rainbow Trout 2,755 Greater than 6 inches
1999/08/09 Rainbow Trout 1,225 Greater than 6 inches
1999/08/03 Rainbow Trout 1,528 Greater than 6 inches
1999/07/19 Rainbow Trout 2,750 Greater than 6 inches
1999/07/06 Rainbow Trout 2,732 Greater than 6 inches
1999/06/22 Rainbow Trout 2,750 Greater than 6 inches
1999/06/02 Rainbow Trout 2,250 Greater than 6 inches
1999/05/24 Rainbow Trout 2,732 Greater than 6 inches
1999/05/07 Rainbow Trout 2,775 Greater than 6 inches
1998/09/21 Rainbow Trout 2,730 Greater than 6 inches
1998/09/09 Rainbow Trout 2,770 Greater than 6 inches
1998/08/17 Rainbow Trout 2,492 Greater than 6 inches
1998/08/03 Rainbow Trout 2,704 Greater than 6 inches
1998/07/20 Rainbow Trout 2,782 Greater than 6 inches
1998/07/07 Rainbow Trout 2,820 Greater than 6 inches
1998/06/22 Rainbow Trout 2,754 Greater than 6 inches
1998/06/01 Rainbow Trout 2,751 Greater than 6 inches
1998/05/20 Rainbow Trout 2,740 Greater than 6 inches
1998/05/04 Rainbow Trout 2,749 Greater than 6 inches
1997/09/29 Rainbow Trout 1,140 Greater than 6 inches
1997/09/25 Rainbow Trout 1,764 Greater than 6 inches
1997/09/08 Rainbow Trout 2,842 Greater than 6 inches
1997/08/28 Rainbow Trout 2,870 Greater than 6 inches
1997/08/08 Rainbow Trout 2,280 Greater than 6 inches
1997/08/04 Rainbow Trout 2,526 Greater than 6 inches
1997/07/21 Rainbow Trout 2,446 Greater than 6 inches
1997/07/07 Rainbow Trout 2,712 Greater than 6 inches
1997/06/16 Rainbow Trout 2,750 Greater than 6 inches
1997/06/02 Rainbow Trout 2,754 Greater than 6 inches
1997/05/20 Rainbow Trout 2,740 Greater than 6 inches
1997/05/05 Rainbow Trout 2,757 Greater than 6 inches
1996/09/17 Rainbow Trout 2,805 Greater than 6 inches
1996/09/05 Rainbow Trout 2,772 Greater than 6 inches
1996/08/20 Rainbow Trout 2,818 Greater than 6 inches
1996/08/05 Rainbow Trout 2,782 Greater than 6 inches
1996/07/23 Rainbow Trout 1,094 Greater than 6 inches
1996/07/22 Rainbow Trout 1,400 Greater than 6 inches
1996/07/08 Rainbow Trout 2,756 Greater than 6 inches
1996/06/17 Rainbow Trout 2,745 Greater than 6 inches
1996/06/03 Rainbow Trout 2,750 Greater than 6 inches
1996/05/20 Rainbow Trout 2,740 Greater than 6 inches
1996/05/07 Rainbow Trout 2,772 Greater than 6 inches
1995/08/29 Rainbow Trout 2,749 Greater than 6 inches
1995/08/08 Rainbow Trout 2,770 Greater than 6 inches
1995/07/27 Rainbow Trout 2,737 Greater than 6 inches
1995/07/14 Rainbow Trout 2,773 Greater than 6 inches
1995/06/28 Rainbow Trout 2,728 Greater than 6 inches
1995/06/09 Rainbow Trout 2,750 Greater than 6 inches
1995/05/23 Rainbow Trout 5,497 Greater than 6 inches
1994/08/26 Rainbow Trout 3,900 Greater than 6 inches
1994/08/09 Rainbow Trout 2,548 Greater than 6 inches
1994/07/29 Rainbow Trout 2,037 Greater than 6 inches
1994/07/15 Rainbow Trout 2,525 Greater than 6 inches
1994/06/28 Rainbow Trout 2,760 Greater than 6 inches
1994/06/13 Rainbow Trout 2,750 Greater than 6 inches
1994/05/25 Rainbow Trout 5,475 Greater than 6 inches
1993/09/02 Rainbow Trout 5,504 Greater than 6 inches
1993/08/05 Rainbow Trout 2,642 Greater than 6 inches
1993/07/15 Rainbow Trout 2,769 Greater than 6 inches
1993/07/01 Rainbow Trout 5,592 Greater than 6 inches
1993/05/26 Rainbow Trout 5,501 Greater than 6 inches
1992/11/16 Rainbow Trout 6,062 Greater than 6 inches
1992/07/14 Rainbow Trout 7,370 Less than 6 inches
1989/07/28 Rainbow Trout 480 Greater than 6 inches
1989/07/06 Rainbow Trout 450 Greater than 6 inches
1989/06/07 Rainbow Trout 537 Greater than 6 inches
1989/05/16 Rainbow Trout 2,000 Greater than 6 inches
1988/08/22 Rainbow Trout 840 Greater than 6 inches
1988/08/10 Rainbow Trout 1,170 Greater than 6 inches
1988/07/20 Rainbow Trout 1,050 Greater than 6 inches
1988/07/05 Rainbow Trout 1,050 Greater than 6 inches
1988/06/21 Rainbow Trout 1,500 Greater than 6 inches
1988/06/03 Rainbow Trout 1,500 Greater than 6 inches
1988/04/19 Rainbow Trout 3,009 Greater than 6 inches
1987/08/05 Rainbow Trout 2,002 Greater than 6 inches
1987/07/16 Rainbow Trout 2,520 Greater than 6 inches
1987/06/22 Rainbow Trout 3,000 Greater than 6 inches
1987/05/20 Rainbow Trout 2,100 Greater than 6 inches
1987/05/19 Rainbow Trout 3,000 Greater than 6 inches
1987/03/25 Rainbow Trout 2,275 Greater than 6 inches
1986/08/08 Rainbow Trout 5,001 Greater than 6 inches
1986/07/18 Rainbow Trout 40,100 Less than 6 inches
1986/07/11 Rainbow Trout 6,000 Greater than 6 inches
1986/06/13 Rainbow Trout 8,971 Greater than 6 inches
1986/03/18 Rainbow Trout 1,001 Greater than 6 inches
1986/03/17 Rainbow Trout 1,001 Greater than 6 inches
1985/09/17 Cutthroat Trout 20,999 Less than 6 inches
1985/07/22 Yellowstone Cutthroat Trout 2,995 Greater than 6 inches
1985/07/22 Yellowstone Cutthroat Trout 9,985 Less than 6 inches
1985/07/15 Cutthroat Trout 8,835 Less than 6 inches
1985/06/24 Rainbow Trout 20,378 Less than 6 inches
1985/06/19 Rainbow Trout 20,085 Less than 6 inches
1985/06/18 Rainbow Trout 1,050 Greater than 6 inches
1985/06/17 Rainbow Trout 3,000 Greater than 6 inches
1985/06/03 Rainbow Trout 3,150 Greater than 6 inches
1985/05/29 Rainbow Trout 2,100 Greater than 6 inches
Source: IDFG Fish Stocking Database.

Licenses and Tags

Learn more about IDFG Licenses, Tags & Permits
 

Fishing Rules, 2022 - 2024

All Waters Open All Year

Except as modified in Special Rules
Fishing is not allowed within the posted upstream and downstream boundary of any fish weir or trap.

Daily Bag Limits

The following daily bag limits apply to all waters within each region except as modified in the Special Rules. The possession limit is 3-times the daily bag limit after the second day of the season.

Special Rules

No Special Rules for Ashton Reservoir.
Upper Snake Region Bag Limits
Bass (Largemouth and Smallmouth)

  • Bass limit is 6, both species combined

Brook Trout

  • Brook Trout limit is 25
  • Harvest allowed during any open season unless otherwise noted under Special Rules - if gear or bait restrictions are listed, they must be followed when fishing for Brook Trout

Bull Trout

  • Bull trout limit is 0, catch-and-release

Kokanee

  • Kokanee limit is 15

Sturgeon

  • Sturgeon limit is 0, catch-and-release
  • Sturgeon must not be removed from the water and must be released upon landing
  • Barbless hooks are required
  • Use of a sliding swivel device to secure a weight, and a lighter test line to secure weight to sliding swivel device is required. See fishing regulations for details

Tiger Muskie

  • Tiger Muskie limit is 2, none under 40 inches

Trout includes Brown Trout, Golden Trout, Lake Trout, Splake, Arctic Grayling, Cutthroat Trout, Rainbow Trout, and trout hybrids (e.g. Tiger Trout)

  • Trout limit is 6, all species combined
  • Does not include Bull Trout and Brook Trout which are listed separately

Whitefish

  • Whitefish limit is 25 - see Big Lost River exception
  • Harvest allowed during any open season unless otherwise noted under Special Rules - if gear or bait restrictions are listed, they must be followed when fishing for whitefish

Protected Nongame Fish including Northern Leatherside Chub and Bluehead Sucker (also known as Green Sucker)

  • May not be harvested or possessed

All Other Fish Species includes bullfrogs and crayfish

  • No bag, size or possession limit
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