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For sale
  • $45,000,000

    28899 Poison Spider Rd, Casper, WY 82604

    5beds
    --sqft
    : 
    Farm
    Built in 1977
    -- sqft lot
    $-- Zestimate®
    $--/sqft
    $-- HOA

    What's special

    Productive landSubstantial acreageBreathtaking sceneryReliable water sources
    This expansive and contiguous shortgrass prairie ranch offers low overhead and the capacity to support over 1,000 cattle year-round. An exceptional property, featuring a convenient location, productive land, and breathtaking scenery, along with robust infrastructure, working facilities, and reliable water sources. The Wild Horse Basin Ranch is enhanced by its state and BLM leases, as well as a unique long-term lease with PacifiCorp and several other private leases on the property. Spanning nearly 93,000 acres, this offering is incredibly rare, especially just 25 miles from the growing city of Casper. Centrally located between the Granite Mountains to the north and the Bighorn Mountains to the south, this ranch has a storied history of cattle ranching. Aesthetic Value The Wild Horse Basin Ranch is an incredibly scenic and diverse property that contains nearly every habitat Wyoming has to offer across its deeded and leased parcels. Conservation Value This property is entirely within core sage grouse habitat, making it an ideal candidate for a conservation easement. Investment Value The Wild Horse Basin Ranch presents a unique opportunity to acquire a large ranch less than 30 minutes from a thriving city. With its substantial acreage and distinctive long-term grazing leases, this property achieves a commendable capitalization rate, maintains low overhead, and offers potential for investment returns and long-term appreciation. 31,892.85 +/- deeded acres and 6,604 acres of Wyoming State leases, 34,946 acres of BLM, 7,840 acres of private leases, and 11,069 acres with a long-term lease with Pacificorp
    14 days
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    511
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    15
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    Zillow last checked:

    Listing updated:

    Listed by:

    Jared Souza 307-331-2647,

    MIRR Ranch Group

    Source: My State MLS,MLS#: 11519927

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      Facts & features

      Interior

      Bedrooms & bathrooms
      • Bedrooms: 5
      • Bathrooms: 3
      • Full bathrooms: 2
      • 1/2 bathrooms: 1
      Basement
      • Area: 0
      Heating
      • Radiant
      Features
      • Has basement: No
      • Has fireplace: No
      Interior area
      • Total structure area: 0
      • Finished area above ground: 0
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      Property

      Features
      • Patio & porch: Deck
      Details
      • Parcel number: 33830510000800
      • Lease amount: $0

      Construction

      Type & style
      • Home type: SingleFamily
      • Property subtype: Farm
      Materials
      • Frame
      • Roof: Asphalt
      Condition
      • New construction: No
      • Year built: 1977

      Utilities & green energy

      • Electric: Amps(0)

      Community & HOA

      HOA
      • Has HOA: No
      Location
      • Region: Casper

      Financial & listing details

      • Tax assessed value: $10,560
      • Annual tax amount: $68
      • Date on market: 5/11/2026
      • Date available: 05/01/2025
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        Estimated market value

        Not available

        Estimated sales range

        Not available

        $2,254/mo

        Price history

        DateEventPrice
        5/11/2026Listed for sale$45,000,000
        Source: My State MLS #11519927 Report a problem
        5/2/2026Listing removed$45,000,000
        Source: My State MLS #11519927 Report a problem
        6/18/2025Listed for sale$45,000,000
        Source: My State MLS #11519927 Report a problem

        Public tax history

        YearProperty taxesTax assessment
        2025$68 -1.7%$1,003 -3.3%
        2024$69 +2.9%$1,037 +4.5%
        2023$67 +10.1%$992 +10.1%
        2022$61 -8.1%$901 -8.1%
        2021$67 -95.5%$980 -95.5%
        2020$1,474 -15.9%$21,709 -15.9%
        2019$1,753 +10.9%$25,815 +10.9%
        2018$1,580 -0.2%$23,272 -0.2%
        2017$1,583 $23,313 -46.7%
        2015$1,583 -46.7%$43,743 +0.1%
        2014$2,968 $43,712
        2013-- --
        2012-- --
        2011-- --
        2010-- --
        2009-- --
        2008-- --

        Find assessor info on the county website

        Monthly payment

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          All calculations are estimates and provided by Zillow, Inc. for informational purposes only. Actual amounts may vary.
          HOA fees may include property taxes on listings classified as Co-Ops. Contact the listing agent and/or owner for fee details.
          Mortgage interest rates are dependent on a number of factors, including credit score, down payment, and repayment length. Interest rate data provided by Zillow Group Marketplace, Inc. as of 1/1/1970 from various mortgage lenders with which we have lead or other similar arrangements; the Estimated Payment is an average of those rates.
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          Climate risks

          Neighborhood: 82604

          Getting around

          0 / 100
          Car-Dependent
          21 / 100
          Somewhat Bikeable

          Nearby schools

          GreatSchools rating

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