Document:

EXHIBIT 10.6

                      ASSIGNMENT OF OIL AND GAS LEASE WITH
                        RESERVATION OF OVERRIDING ROYALTY

          Know All Men by These Presents,  that the  undersigned,  Nova Leasing,
LLC., hereinafter called Assignor (whether one or more) for and in consideration
of Sixty-Four Thousand Dollars, the receipt whereof is hereby acknowledged, does
hereby  sell,  assign,  transfer  and  set  over  to  Sun  River  Energy,  Inc.,
hereinafter called Assignee,  all of its right,  title and interest,  subject to
the overriding  royalty  reservation  hereinafter set out, in and to the oil and
gas lease  dated  August 2, 2004 , from the State of  Wyoming,  lessor,  to Nova
Leasing,  LLC.,  lessee,  recorded as WY-04-00375 , insofar as said lease covers
the following described land in Natrona County, State of Wyoming: Sec 16, T 37N,
R 77W and containing 640 acres, more or less,  together with the rights incident
thereto and the  personal  property  thereon,  appurtenant  thereto,  or used or
obtained in connection therewith.

          The Assignor herein expressly  excepts,  reserves and retains title to
an  undivided  3.5% of all oil,  gas and  casinghead  gas  produced,  saved  and
marketed  from the above  described  land under the  provisions of the aforesaid
lease, or any extension or renewal thereof, as an overriding  royalty,  free and
clear  of any  cost  and  expense  of the  development  and  operation  thereof,
excepting taxes applicable to said interest and the production therefrom.  There
is an existing 12.5% royalty to the State of Wyoming, and an existing 4% royalty
to Sharon Fowler as contained in the previous  assignment  from Sharon K. Fowler
to Assignor.

          This Assignment is conditional upon Assignees agreement.  To begin the
drilling  of a well on some part of the above  described  land  within  270 days
hereafter  subject  to  drilling  rig.  availability  for which this date may be
extended,  and continue such drilling with reasonable diligence until a well has
been completed to the known oil producing sand of that territory,  or granite or
other impenetrable substances, through which a reasonably prudent operator would
not undertake to drill,  be  encountered.  If such well is not commenced by such
date, or extension  thereof,  then this Assignment  shall be terminated and will
expire.

          And for  the  same  consideration  the  Assignor  covenants  with  the
Assignee,  its or his heirs,  successors  or assigns,  that the  Assignor is the
lawful owner of and has good title to the interest above assigned in and to said
lease, estate, rights and property, free and clear from all liens,  encumbrances
or adverse claims;  that said lease is a valid and subsisting  lease on the land
above described, and all rentals and royalties due thereunder have been paid and
all  conditions  necessary  to keep  the  same  in full  force  have  been  duly
performed;  and that the  Assignor  will  warrant  and  forever  defend the same
against all persons whomsoever, lawfully claiming or to claim the same.

     Executed this 17th day of April, 2006.

ASSIGNEE                                                      ASSIGNOR
Sun River Energy, Inc.                                       Nova Leasing, LLC

By: Michael A. Littman, President                           By: Robert G. Fowler

<PAGE>

STATE OF COLORADO

COUNTY OF JEFFERSON

          On this 17th day of April 2006,  before me, the undersigned,  a Notary
Public in and for said State, personally appeared Robert Fowler, Manager of Nova
Leasing,  LLC,  known to me to be the person  whose name is  subscribed  to this
within instrument, and who upon oath swore that the statements therein contained
are true and correct.

WITNESS my hand and official seal.

My Commission expires: 3/20/2010
                       ---------

                                  Notary Public
                                Cynthia Shoemaker

STATE OF COLORADO
COUNTY OF JEFFERSON                                           ss.

          On this 17th day of April 2006,  before me, the undersigned,  a Notary
Public in and for said State, personally appeared Michael A. Littman,  President
of Sun River Energy, Inc., known to me to be the person whose name is subscribed
to this within  instrument,  and who upon oath swore that the statements therein
contained are true and correct.

WITNESS my hand and official seal.

My Commission expires: 3/20/2010

                                  Notary Public
                                Cynthia ShoemakerEXHIBIT 10.7

                      ASSIGNMENT OF OIL AND GAS LEASE WITH
                        RESERVATION OF OVERRIDING ROYALTY

         Know All Men by These Presents, that the undersigned, Sharon K. Fowler,
hereinafter  called Assignor  (whether one or more) for and in  consideration of
One Hundred Fifty Thousand Dollars,  the receipt whereof is hereby acknowledged,
does hereby  sell,  assign,  transfer  and set over to Sun River  Energy,  Inc.,
hereinafter called Assignee,  all of its right,  title and interest,  subject to
the overriding  royalty  reservation  hereinafter set out, in and to the oil and
gas leases

Lease No.    Dated      T. R. Section      Acres        County
---------    -----      -------------      -----        ------
0600246     4/2/06      516T41nr79W        640          Johnson
0600247     4/2/06      536T42NR79W        640          Johnson
0600249     4/2/06      536T42NR81W        640          Johnson
0600256     4/2/06      536T41NR81W        640          Natrona

together with the rights  incident  thereto and the personal  property  thereon,
appurtenant thereto, or used or obtained in connection therewith.

         The Assignor herein expressly excepts, reserves and retains title to an
undivided 4% of all oil, gas and  casinghead  gas  produced,  saved and marketed
from the above  described land under the provisions of the aforesaid  lease,  or
any extension or renewal thereof,  as an overriding  royalty,  free and clear of
any cost and expense of the development and operation  thereof,  excepting taxes
applicable to said interest and the production  therefrom.  There is an existing
12.5% royalty to the State of Wyoming.

         This Assignment is conditional upon Assignees  agreement.  To begin the
drilling  of a well on some part of the above  described  land  within  one year
hereafter and continue such drilling with reasonable  diligence until a well has
been completed to the known oil producing sand of that territory,  or granite or
other impenetrable substances, through which a reasonably prudent operator would
not undertake to drill,  be  encountered.  If such well is not commenced by such
date, or extension  thereof,  then this Assignment  shall be terminated and will
expire.

         And  for  the  same  consideration  the  Assignor  covenants  with  the
Assignee,  its or his heirs,  successors  or assigns,  that the  Assignor is the
lawful owner of and has good title to the interest above assigned in and to said
lease, estate, rights and property, free and clear from all liens,  encumbrances
or adverse claims;  that said lease is a valid and subsisting  lease on the land
above described, and all rentals and royalties due thereunder have been paid and
all  conditions  necessary  to keep  the  same  in full  force  have  been  duly
performed;  and that the  Assignor  will  warrant  and  forever  defend the same
against all persons whomsoever, lawfully claiming or to claim the same.

                                                     1 of 2

<PAGE>

         Executed this 25 day of April 2006.

ASSIGNEE

SUN RIVER ENERGY, INC.

By: /s/
ASSIGNOR

By: /s/Sharon K. Fowler
         Sharon K. Fowler

STATE OF COLORADO
                                      ss.
COUNTY OF JEFFERSON {

     On this 26th day of April 2006, before me, the undersigned, a Notary Public
in and for said State,  personally appeared Sharon K. Fowler,  known to me to be
the person whose name is subscribed to this within instrument, and who upon oath
swore that the statements therein contained are true and correct.

WITNESS my hand and official seal.
My Commission expires: __________

                                                    ----------------------------
                                                     Notary Public

STATE OF COLORADO
                                     ss.
COUNTY OF JEFFERSON  {

     On this 26 day of April 2006,  before me, the undersigned,  a Notary Public
in and for said State, personally appeared Michael A. Littman,  President of Sun
River  Energy,  Inc.,  known to me to be the person whose name is  subscribed to
this  within  instrument,  and who upon oath swore that the  statements  therein
contained are true and correct.

WITNESS my hand and official seal.
My Commission expires: __________

                                                     ---------------------------
                                                     Notary Public

                                                     2 of 2EXHIBIT 10.8

                         ASSIGNMENT OF OIL AND GAS LEASE

   KNOW ALL MEN BY THESE PRESENTS:

   That the  undersigned  Robert A. Doak, Jr., and Frances L. Doak, J.T. with an
   address of 1207 Alta St., Trinidad,  Colorado 81082,  hereinafter referred to
   as  assignors  for and in  consideration  of Ten Dollars  ($10.00)  and other
   consideration,  the  receipt  of which is hereby  acknowledged,  does  hereby
   convery,  transfer and assign unto Sun River Energy, Inc., with an address of
   7609  Ralston  Rd.,  Denver,  Colorado,  80002,  hereinafter  referred  to as
   assignees,  all of their interest  pursuant to that certain Oil and Gas Lease
   described as follows:

   Lessor:  Nona Jean Myers and ratified by Kenneth Greg Myers and William
Joseph Myers as Co-personal Representatives of the Estate of George F. Myers,
Deceased.

   Lessee:  Mountain West Exploration, Inc.

   Date:    June 10, 2003

   Recording:  Book 14 Page 10616 Deed Records of Colfax County, New Mexico

   Insofar as said lease covers the following  described  land in Colfax County,
New Mexico:

                                  SEE ATTACHED DESCRIPTION

   And for the same consideration,  the Assignors  covenants with Assignee,  its
   heirs,  successors,  and assigns,  that the Assignors are the lawful owner of
   and have good title to the interest  above  assigned in and to said lease and
   that the property is clear from all liens, encumbrances or adverse claims.

   EXECUTED THIS 23rd DAY OF MARCH, 2006.

                                                           Francis L. Doak

                                                           Robert A. Doak, Jr.

                                  NOTARY ACKNOWLEDGEMENT
State of Colorado)
County of Las Animas)
The foregoing instrument was acknowledged before me on the 23rd day of March,
2006. My commission expires April 21, 2009

                                    Witness my hand and official seal:

                                    Notary Public

<PAGE>

     The North one half (2,370 acres) of the following  described  tract of land
located in Colfax County, NM

     Beginning at the O.C. Corner to fractional  Sections No. 21 and 22, Twp. 32
North, Range 23 East of the NMPM;

     thence in a general  southerly  direction  for the  following  courses  and
distances  as taken  from the  deed  from the  Maxwell  Land  Grant  Company  to
Frederick  Roth,  dated May 29,  1901,  recorded in Book #Q,  Deeds,  page #195,
Colfax County records, to wit:

     South 40.50 chains to corner to Sections Nos. 21, 22, 27, 28, Twp 21 North,
Range 23 East;

     thence South 39 degrees,  36 minutes West, 35.15 chains to the intersection
with the  right-of-way to the Atchison,  Topeka and Santa Fe Railway,  being the
same as the New Mexico and Southern Pacific Railway.

     thence  southerly,  following the right of way of the Atchison,  Topeka and
Santa Fe Railway on the following courses and distances:

         South 1 degree, 34 minutes West, 8.80 chains.

         South 34 degrees, 32 minutes East, 10.00 chains.

         South 57 degrees, 32 minutes East, 19.40 chains.

         South 32 degrees, 44 minutes East, 63.48 chains.

         South 18 degrees, 51 minutes East, 25.15 chains.

         South 3 degrees, 13 minutes West, 34.70 chains.

         South 15 degrees, 33 minutes East, 20.00 chains.

         South 27 degrees, 09 minutes East, 22.72 chains.

         South 50 degrees, 29 minutes East, 4.60 chains.

         South 24 degrees, 46 minutes East, 44.00 chains to the Southwest corner
of the herein  described  tract,  which corner is the  intersection  of the East
right-of-way  line of the said Atchison,  Topeka and Santa Fe Railway,  with the
section line between Sections Nos. 3 and 10, Twp 31 North, Range 23 East, NMPM;

<PAGE>

     thence along the South,  East and North sides of the herein described tract
on the following courses and distances, taken from recent survey, to-wit:

     East 4.67  chains to the corner to  Sections  Nos.  2, 3, 10 and 11, Twp 31
North, Range 23 East, NMPM;

     thence North 89 degrees and 54 minutes East,  80 chains;

     North 66 degrees,  52 minutes East, 12.33 chains to the rimrock of Bartlett
Mesa on Railroad Canyon;

     thence along said rimrock for the following courses, and distances:

     North 22 degrees, 7 minutes West, 9.81 chains,

     thence North 10 degrees, 1 minute East, 14.32 chains across the neck of the
Bartlett  Mesa,  leading to what is known as Raton  Peak,  to the rimrock on the
West side of Brush Canyon;

     thence North 40 degrees,  20 minutes East, 23.53 chains crossing a gulch of
Brush Canyon, below Springs to a point on said West rimrock of Brush Canyon;

     thence  following  said rimrock  North 63 degrees,  29 minutes  East,  4.23
chains.

     thence North 39 degrees, 22 minutes East, 6.91 chains;

     thence crossing head of Brush Canyon below Springs,  to a point on the East
rimrock North 69 degrees, 58 minutes East, 19.09 chains;

     thence along the rimrock of Bartlett  Mesa on the East side of Brush Canyon
for the following courses and distances, to-wit:

     North 52 degrees, 33 minutes West, 7.80 chains.

     North 32 degrees, 38 minutes West, 5.68 chains.

     North 26 degrees, 17 minutes West, 14.18 chains,

     thence leaving the rimrock North 11 degrees,  36 minutes East,  7.31 chains
to the quarter-corner to Section No. 36, Twp 32 North, and Section No. 1, Twp 31
North, Range 23 East of the NMPM.

     thence North 0 degrees,  19 minutes  West,  80.43 chains to the midpoint of
the North line of Section No. 36, Twp 32 North, Range 23 East;

     thence North 0 degrees,  44 minutes  East,  80.05 chains to the midpoint of
the North line of Section No. 25, Twp 32 North, Range 23 East;

     thence  North 87 degrees,  39 minutes  West,  39.34 chains to the corner of
Sections Nos. 23, 24, 25, and 26, Twp 32 North, 1~.ange 23 East;

     thence  North 0 degrees,  56 minutes  East,  37.62 chains to a point on the
Colorado--  New Mexico  State  line,  3.21  chains  South of the 0. C. Corner to
fractional Sections Nos . 23 and 24, Twp 32 North, Range 23 East of the NMPM;

     thence along the Colorado -- New Mexico State line on the following courses
and distances, to-wit:

<PAGE>

     North 89 degrees, 54 minutes West, 34.59 chains to Milestone 78.

     North 89 degrees, 3 minutes West, 40.38 chains to Milestone 78-1/2.

     South 89 degrees, 42 minutes West, 78.52 chains to Milestone 79-112.

     South 89 degrees, 8 minutes West, 8.25 chains to the point of beginning.

     The  above-described  tract of land,  contains in all four thousand,  seven
hundred and forty (4,740) acres of land, more or less.

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