HLM Drills 154 Metres of Continuous Lithium, Tantalum and Rubidium Mineralization across Five Adjoining Internal Pegmatite Zones on the Pak Rare Metals Project, Ontario

Houston Lake Mining Inc. (TSX.V: HLM):

Highlights:

• 154.05 metres (m) wide mineralized drill-intercept in pegmatite
  averaging 1.22% Li₂O, 111 ppm Ta₂0₅,
  and 0.41% Rb₂O from 38.50 m to 192.55 m
• Includes 72.55 m wide high-grade lithium zone averaging 1.96% Li₂O,
  106 ppm Ta₂0₅, and
  0.33% Rb₂O from 120.00 m to 192.55 m, and
• A 58.50 m wide tantalum zone averaging 121 ppm Ta₂0₅
  (including 265ppm over 5.00m), 0.57% Li₂O,
  and 0.55% R₂Owas
  intersected from 38.50 m to 97.00 m.

Houston Lake Mining Inc. (TSX.V: HLM), is a mining exploration
company that is specialized in rare metals and is actively exploring for
lithium (Li), tantalum (Ta), rubidium (Rb) and cesium (Cs) by focusing
on its high grade, 100% owned and optioned PAK Rare Metals Project in
northwestern Ontario, Canada. HLM is pleased to announce the results of
the first drill hole from the Phase I, six-hole Diamond Drill Program on
the Pakeagama Lake pegmatite, located on the 2,816 hectare (6,958 acre)
PAK Rare Metals Project.

In March, 2013, HLM completed the Phase I drill program to follow-up
high grade surface channel sampling results obtained during the
Company′s 2012 summer program (see HLM news releases dated January 10,
2013, January 29, 2013 and April 25, 2013). The objectives of the
drilling program were to (1) determine the presence, orientation,
thickness and mineralogical zonation of the Pakeagama Lake pegmatite at
depth, and (2) to refine the mineralogical characterization of these
zones and better establish their Li, Ta, Rb, and Cs potential. Drill
hole PL13-001 intersected five adjoining and steeply inclined pegmatite
zones with the sequence as follows: Wall Zone (WZ), Central Intermediate
Zone (CIZ), Lower Intermediate Zone (LIZ), Upper Intermediate Zone
(UIZ), and LIZ. As displayed in Table I below, two zones display strong
tantalum and rubidium values and two zones display high lithium grades.
In addition to Table I, a plan map of the exposed Pakeagama Lake
pegmatite with PL13-001′s drill-hole trace and sections highlighting
results by elements can be seen in Figures I and II and are located at http://www.houstonlakemining.com/images/PL-13-Sections.png.

Table I ? Core Length/Drill-Hole Intercepts (Pakeagama Lake pegmatite)

(1)The intervals in Table I are drill intersection widths.
There is currently insufficient data to determine the true thickness of
the pegmatite.

(2)n/a = Not applicable.

The CIZ is a distinct, near-vertical, Ta and Rb-enriched pegmatite zone
located in the upper portion of the drill hole and in contact with the
Li-enriched LIZ. The CIZ consists of predominantly grey K-feldspar with
varying degrees of minor lithian mica + quartz alteration. Locally,
veinlets and patches of lepidolite occur which typically contain the
highest Ta grades found to date. Drill hole PL-13-001 targeted the CIZ
at depth (under the area sampled by channel 1R seen from press release
January 29, 2013) and showed the zone persisted at depth with a similar
width as on surface. Channel 01R which sampled a portion of the exposed
zone averaged 192ppm Ta₂O₅/14metres. Drill hole
PL-13-001 intersected149ppm Ta₂O₅ /24.3m
(72.7-97.0m) including 206ppm/6.0m (76.0-82.0m). The zone at depth was
overall, more mineralogically evolved and consistent than the exposed
zone.

The LIZ comprises a substantial portion of the pegmatite in PL-13-001
and is considered an intermediate stage, near-vertical zone with
significant Li and Rb content. The zone consists of mainly K-feldspar,
Na-feldspar, quartz, 'SQUI? and lithian muscovite. SQUI is a term used
to describe an oriented spodumene + quartz intergrowth after primary
lithian mineral petalite. The zone has undergone both plastic and
brittle deformation. The UIZ represents a high-grade Li zone within the
LIZ and is dominated by SQUI, with minor grey K-feldspar and primary
white spodumene in quartz. Phosphate minerals and lithian mica are the
common accessory minerals.

The drill hole favorably showed that the large exposure of granite on
surface (see Figures I and II located at http://www.houstonlakemining.com/images/PL-13-Sections.png)
does not persist at depth and appears to be a large xenolith (granite
raft). The length of continuous pegmatite intersected with PL-13-001
indicates that the pegmatite appears to be increasing in width towards
the southeast.

The Pakeagama Lake pegmatite does not currently have a resource
calculation, but the tantalum and rubidium mineralogy of the
lepidolite-bearing CIZ, and SQUI as the as the dominant lithium mineral
assemblage in the UIZ and LIZ compare favourably to the tantalum,
rubidium and lithium ore zones at the Tanco Mine. The Tanco Mine is
located in southeastern Manitoba and was a lithium mineral concentrate
producer from 1986 until operations were suspended in 2009. Tanco was
also a tantalum mineral concentrate producer until March 2013 when
operation of this circuit ceased.

'We are pleased to have successfully completed the field work for what
was a very exciting Phase I drill program.? said Trevor R. Walker,
President of HLM. 'These first drill hole results from the Pakeagama
Lake pegmatite display the potential for it to become a leading high
grade, multi-element, large tonnage exploration target for rare metals
in North America. HLM anxiously awaits the pending analytical results
for the five remaining drill holes and we look forward to releasing them
once they are received and interpreted for our shareholders?.

Table II ? Collar Locations for Diamond Drill Hole (DDH)

Due Diligence

All scientific and technical information in
this release has been reviewed and approved by Peter J. Vanstone,
P.Geo., the qualified person (QP) under the definitions established by
National Instrument 43-101. Under HLM′s QA/QC procedures, the diamond
drill contract specified NQ-sized drill core providing a 47.6 mm
diameter sample. The drill holes were oriented perpendicular to the
strike of the pegmatite and drilled continuously across it. Sample
security and chain of custody started with the removal of core from the
core tube and boxing of drill core at the drill site. The boxed core
remained under the custody of the drill contractor until it was
transported from the drill to the secure on-site Core Shack facility by
either the drill contractor or one of the Company′s designated
personnel. At the on-site Core Shack, core boxes were opened and
inspected to ensure correct boxing and labelling of the core by the
drill contractor, photographed and then re-closed. The core was stored
securely until moved into the Core Shack for processing. The company
geologists logged the core, and then marked and tagged it for sampling
and splitting. Each core sample was assigned a tag with a unique
identifying number. Sample lengths are typically one meter, but can be
less depending on zone mineralogy and boundaries. The Core was then
re-closed and shipped to the company′s off-site core splitting facility
in Sudbury, Ontario. Core marked for splitting was split using a diamond
core saw with a mounted jig to assure the core was cut lengthwise into
equal halves. Half of the core was sent to an analytical laboratory for
quantitative analysis of select elements. The remaining half of the core
is retained and incorporated into HLM′s secure, off-site core library.

All samples were assayed by an ISO accredited laboratory. Sample blanks
along with tantalum, lithium, rubidium and cesium certified reference
material was routinely inserted into the sample stream in accordance
with industry recommended practices. Field duplicate samples were also
taken in accordance with industry recommended practices.

About Houston Lake Mining Inc.

HLM is a mining exploration
company that is specialized in rare metals and is actively exploring for
lithium (Li), tantalum (Ta), rubidium (Rb) and cesium (Cs) by focusing
on its high grade, 100% owned and optioned PAK Rare Metals Project
spanning 2,816 hectares (6,958 acres) in northwestern Ontario, Canada.
HLM has a total of 75,236,695 common shares issued and outstanding. For
additional information, please visit www.houstonlakemining.com.

Company Contact Information

Trevor R. Walker _MBA, President

2736 Belisle Drive

Val
Caron, ON.

P3N 1B3 CANADA

T. +001 705.897.7622

F.
+001 705.897.7618

Forward-looking Statements

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nor its Regulation Services Provider (as that term is defined in the
policies of the TSX Venture Exchange) accepts responsibility for the
adequacy or accuracy of this release. This release includes certain
statements that may be deemed 'forward-looking statements?. All
statements in this release, other than statements of historical facts,
that address future production, reserve potential, exploration drilling,
exploitation activities and events or developments that the Company
expects are forward-looking statements. Although the Company believes
the expectations expressed in such forward-looking statements are based
on reasonable assumptions, such statements are not guarantees of future
performance and actual results or developments may differ materially
from those in the forward-looking statements. Factors that could cause
actual results to differ materially from those in forward looking
statements include market prices, exploitation and exploration
successes, continued availability of capital and financing, and general
economic, market or business conditions. Investors are cautioned that
any such statements are not guarantees of future performance and those
actual results or developments may differ materially from those
projected in the forward-looking statements. For more information on the
Company, Investors should review the Company′s registered filings what
are available at www.sedar.com.

Houston Lake Mining Inc.

Trevor R. Walker, +001 705.897.7622

_MBA,
President

F. +001 705.897.7618