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Home › Waters › South Dakota › Castle Creek
Tailwater · The central Black Hills, below Deerfield Reservoir in Pennington County, running east through national forest toward Rapid Creek · South Dakota

Castle Creek Fishing Guides

A small, cold Black Hills release below Deerfield Dam, holding wild browns and brookies in meadow water most visitors drive straight past.

A braided prairie river running past a raw cut bank
Gauge location. Map data © OpenStreetMap contributors.

Guides on the Castle Creek

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About the Castle Creek

Castle Creek below Deerfield Dam is a genuinely small piece of water and it rewards anglers who like that. The release out of Deerfield Reservoir keeps the creek cold and flowing through a Black Hills summer that would otherwise shrink it to a trickle, and the reach below the dam runs through open meadow and ponderosa pine in the Black Hills National Forest. It is the kind of stream a person can fish comfortably in an afternoon and still not cover properly.

Brown trout carry the fishery and a good share of them are wild rather than stocked, holding in undercut banks, beaver-influenced flats and the deeper corners where the meadow channel bends. Brook trout occupy the colder upper water and the small feeder springs. Rainbows are present through the stocked reaches. None of these fish are large by western standards, and anyone arriving expecting a Bighorn or a Missouri will be disappointed, but the stream is pretty, the fish are willing and the pressure is low.

The meadow character is the thing to understand before fishing it. Much of the creek runs through open grass with almost no overhead cover, which means the trout can see an angler coming from a long way off. A low approach, a long leader and a careful first cast matter more here than fly selection. The willow-lined sections and the beaver complexes hold the better fish precisely because they are harder to approach.

Access is straightforward through the national forest, with Forest Service roads following much of the corridor and Deerfield Lake Recreation Area anchoring the top end. Some of the lower creek crosses private ranch ground, so respect fences and use the public reaches. Releases from Deerfield are modest and fairly steady, but check the gauge before making a long drive, and be aware that Black Hills weather can change the creek quickly after a summer storm.

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Read the full license

Version 1.0, dated 6 September 2026. Applies to every photograph submitted to GuidedFloats through the contact form, a species page, or the community board.

1. What you give us

By ticking the box on the form you grant Guided Floats, LLC (“GuidedFloats”, “we”) a non-exclusive, worldwide, royalty-free license to store, copy, resize, crop and display your photograph on guidedfloats.com, in GuidedFloats’ own social media accounts and mobile apps, and in material that promotes the site itself, in connection with the fish, water or community feature you sent it in for. The license lasts until you withdraw it (section 4).

You keep the copyright. The license is not exclusive, so you can use the photo anywhere else and license it to anyone else. We will not sell your photo, license it on to anyone else on its own, or use it in paid advertising for a third party.

2. What you confirm

You confirm that you took the photograph yourself (or otherwise own the rights to it), that you have the right to grant this license, and that publishing the photo does not infringe anyone else’s copyright, privacy or other rights.

If any person is recognisable in the photo, you confirm that they have agreed to its being published here, and that a parent or guardian has agreed on behalf of anyone under 18. Please do not send photographs of other people’s catches, screenshots, or pictures copied from other websites or social media.

3. Credit

We print the credit name you give us beside the photo wherever it appears on the site, and record it as the photo’s creator in the page’s structured data. If you leave the credit blank we use the name you gave us on the form. Write “Anonymous” if you prefer no name at all. Your email address, phone number and the exact spot the photo was taken are never published.

4. Withdrawing the license

You can withdraw the license at any time by emailing hello@guidedfloats.com, or by using the contact form, and telling us which photo you mean. We will remove the photo from guidedfloats.com within 7 days of receiving your message and stop using it in anything new. Copies that are already outside our control — search-engine caches, social posts that have already gone out, printed material already produced — may take longer to disappear or may not be recallable, and we are not responsible for those.

5. What we may do

We choose which photos to publish and may decline any submission without giving a reason. We may crop, resize, sharpen or colour-correct a photo for display, and we may remove a photo at any time. We will not alter a photo in a way that misrepresents the fish, the water or you.

6. Your details

We keep your name, email address, the credit name, the water and date you gave us, and the network address the submission came from, with the submission record, as our evidence of this license. We hold that record for as long as the photo is published and for the retention period described in our privacy policy. Location data that your camera or phone embedded in the file is removed before the photo is published.

7. Versions

The version of this license you accepted is stored with your submission and printed with the photo. A later version does not apply to a photo you have already sent unless you agree to it.

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Reviewed by hand before it appears. Pick the water, not the spot — we never publish exact locations.

Never published. We use it only if we need to ask about the photo.

Posting to Castle Creek.

JPG, PNG or WebP, up to 12 MB. We resize it and strip the location data out of the file.

The name shown under the photo. Leave blank to stay anonymous.

Reader photo license v1.0 — the short version:

  • You grant Guided Floats, LLC a non-exclusive, royalty-free license to publish, resize and crop your photo on guidedfloats.com and in GuidedFloats’ own social posts and apps. You keep the copyright and can use the photo anywhere else.
  • You confirm that you took the photo yourself, that publishing it does not infringe anyone else’s rights, and that anyone recognisable in it (or a parent or guardian, if they are under 18) is happy for it to appear here.
  • Credit is printed beside the photo wherever it appears on the site, using the credit name you give us. Leave it blank and we use your name; write “Anonymous” for no name. Your email address is never published.
  • Withdrawing is one email to hello@guidedfloats.com naming the photo. It comes off the site within 7 days.
Read the full license

Version 1.0, dated 6 September 2026. Applies to every photograph submitted to GuidedFloats through the contact form, a species page, or the community board.

1. What you give us

By ticking the box on the form you grant Guided Floats, LLC (“GuidedFloats”, “we”) a non-exclusive, worldwide, royalty-free license to store, copy, resize, crop and display your photograph on guidedfloats.com, in GuidedFloats’ own social media accounts and mobile apps, and in material that promotes the site itself, in connection with the fish, water or community feature you sent it in for. The license lasts until you withdraw it (section 4).

You keep the copyright. The license is not exclusive, so you can use the photo anywhere else and license it to anyone else. We will not sell your photo, license it on to anyone else on its own, or use it in paid advertising for a third party.

2. What you confirm

You confirm that you took the photograph yourself (or otherwise own the rights to it), that you have the right to grant this license, and that publishing the photo does not infringe anyone else’s copyright, privacy or other rights.

If any person is recognisable in the photo, you confirm that they have agreed to its being published here, and that a parent or guardian has agreed on behalf of anyone under 18. Please do not send photographs of other people’s catches, screenshots, or pictures copied from other websites or social media.

3. Credit

We print the credit name you give us beside the photo wherever it appears on the site, and record it as the photo’s creator in the page’s structured data. If you leave the credit blank we use the name you gave us on the form. Write “Anonymous” if you prefer no name at all. Your email address, phone number and the exact spot the photo was taken are never published.

4. Withdrawing the license

You can withdraw the license at any time by emailing hello@guidedfloats.com, or by using the contact form, and telling us which photo you mean. We will remove the photo from guidedfloats.com within 7 days of receiving your message and stop using it in anything new. Copies that are already outside our control — search-engine caches, social posts that have already gone out, printed material already produced — may take longer to disappear or may not be recallable, and we are not responsible for those.

5. What we may do

We choose which photos to publish and may decline any submission without giving a reason. We may crop, resize, sharpen or colour-correct a photo for display, and we may remove a photo at any time. We will not alter a photo in a way that misrepresents the fish, the water or you.

6. Your details

We keep your name, email address, the credit name, the water and date you gave us, and the network address the submission came from, with the submission record, as our evidence of this license. We hold that record for as long as the photo is published and for the retention period described in our privacy policy. Location data that your camera or phone embedded in the file is removed before the photo is published.

7. Versions

The version of this license you accepted is stored with your submission and printed with the photo. A later version does not apply to a photo you have already sent unless you agree to it.

Access

Below Deerfield Dam - the gauge reach and the top of the release water.
Deerfield Lake Recreation Area - developed access, boat ramp and campground at the reservoir.
Castle Creek Trail - walk-in access along the upper meadow reach.
Forest Service Road 17 crossings - roadside access through the national forest corridor.
Mystic area - lower creek access toward the Rapid Creek confluence.
Silver City - access on the lower reach near the confluence.
Deerfield Trail crossings - walk-in access to less pressured meadow water.

Seasons

Spring: runoff and snowmelt colour the creek, but the browns feed hard as it drops.
Summer: the prime season, with cold releases and strong terrestrial fishing in the meadows.
Fall: brown trout colour up and move, and the Black Hills are at their best.
Winter: cold and often iced, with limited practical access on forest roads.

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Questions

What is the current flow on the Castle Creek?

As of Sep 17, 4:45 am, the USGS gauge CASTLE CREEK BELOW DEERFIELD DAM, SD reads 9 cfs. Conditions update every 15 minutes.

What species can you catch on the Castle Creek?

Anglers target Brook Trout, Brown Trout, Rainbow Trout on the Castle Creek in South Dakota.

Where can you access the Castle Creek?

Below Deerfield Dam - the gauge reach and the top of the release water. Deerfield Lake Recreation Area - developed access, boat ramp and campground at the reservoir. Castle Creek Trail - walk-in access along the upper meadow reach. Forest Service Road 17 crossings - roadside access through the national forest corridor. Mystic area - lower creek access toward the Rapid Creek confluence. Silver City - access on the lower reach near the confluence. Deerfield Trail crossings - walk-in access to less pressured meadow water.

When is the best time to fish the Castle Creek?

Spring: runoff and snowmelt colour the creek, but the browns feed hard as it drops. Summer: the prime season, with cold releases and strong terrestrial fishing in the meadows. Fall: brown trout colour up and move, and the Black Hills are at their best. Winter: cold and often iced, with limited practical access on forest roads.

Where are the fishing regulations for the Castle Creek?

Regulations change by season and section. Read the current rules on the South Dakota agency site: https://gfp.sd.gov/regulations/