HLM Identifies Strong Rubidium Grades up to 0.53% Rb20 over 14 Meters on the Pak Rare Metals Project in Northwestern Ontario

Houston Lake Mining Inc. (TSX.V: HLM), is a mining exploration
company which is actively exploring for the rare metals lithium, cesium,
tantalum, and rubidium by currently focusing on its 100% owned and
optioned PAK Rare Metals Project in northwestern Ontario, Canada. HLM is
pleased to announce some of the remaining results from its 2012 Channel
Sample Program on the Pakeagama Lake pegmatite, located at the 1,792
hectare (4,424 acre) PAK Rare Metals Project.

In September 2012, Peter J. Vanstone, P.Geo. the qualified person (QP)
for the project, conducted a 91 sample channel sampling program on the
Pakeagama Lake pegmatite in order to confirm historical results and to
add additional channel samples while further sampling by distinct
geologic zones. In addition to the high grade lithium oxide results up
to 4.74 Li₂0 over 15 meters, and strong tantalum oxide
results up to 192ppm Ta₂0₅ over 14 meters reported
by HLM in January, 2013, the program has also identified rubidium (Rb)
oxides in a distinct pegmatite zone as discussed below:

Central Intermediate Zone (CIZ)

Table 1

The Central Intermediate Zone (CIZ) is located in the upper portions of
the pegmatite. It is in contact with both the Upper Intermediate Zone
(UIZ) and Upper Wall Zone, and persists to the southeast edge of the
outcrop where it is believed the pegmatite continues under the till
cover. Channel 19 is located in the central portion of the exposed CIZ
where the zone consists predominantly of grey K-feldspar with minor
lithian mica + quartz alteration. To the southeast, the K-feldspar is
altered to a mica+quartz mixture and was sampled by Channel 7R (highest
rubidium grades found to date in the exposed pegmatite). Samples from
this channel consisted of similarly sized fragments of randomly oriented
K-feldspar with varying degrees of mica+quartz alteration. In the
adjacent area to the northeast of Channel 7R, the alteration consists of
K-feldspars more or less completely replaced with a lithian mica +
quartz mixture where veinlets and patches of lepidolite occur. This
altered zone, which was sampled by Channel 1, contains strong tantalum
and rubidium grades over a significant width.

When considering the CIZ as outlined in Table 1, the distance between
channels 19 and 1 is approximately 35m. Overall, this zone has an
exposed surficial expression of approximately 100m in length and remains
open to both the southeast and northwest.

The Pakeagama Lake pegmatite does not currently have a resource, however
the mineralogy of the CIZ and the presence of lepidolite is similar to
the CIZ described in the Tanco pegmatite. The Tanco pegmatite is located
southwest of the PAK Rare Metals Project in southeastern Manitoba and
has recently ceased mining production from their CIZ zone.

'In addition to the high-grade lithium results of up to 4.74 Li₂0
over 15 meters, and high tantalum results of up to 192ppm over 14 meters
encountered and reported in January, these strong rubidium grades from
the program entrench the Pakeagama Lake pegmatite as a leading
high-grade, multi-element exploration target for rare metals in North
America. Furthermore, within the next three to five weeks, HLM will
begin receiving assay results from our Phase I, 1,000-meter diamond
drill program that commenced in March,' said Trevor R. Walker, President
of HLM.

Due Diligence

All scientific and technical information in
this release has been reviewed and approved by Peter J. Vanstone, P.Geo.
who is the qualified person (QP) under the definitions established by
National Instrument 43-101. Under HLM′s QA/QC procedures, channels are
cut with a motorized circular diamond saw, and are 4 cm wide and 10 cm
deep. The channels are oriented perpendicular to the strike of the
pegmatite internal mineralogical zones and are cut continuously across
the zones. The samples are removed using a hammer and chisel. The length
of a channel is determined by the width of the pegmatite zone. Offset
channels are cut where deemed appropriate. Sample lengths typically are
1 metre but can be less depending on zone mineralogy and boundaries.
Samples are described, placed into a poly sample bag with a numbered
sample tag and then shipped to the assay lab for quantitative analysis
for select elements. All HLM samples are currently being assayed by
Activation Laboratories Ltd. with all samples being delivered to their
Thunder Bay facility. Sample blanks along with tantalum certified
reference samples and lithium-rubidium-cesium standard samples are
routinely inserted into the sample stream in accordance with industry
best practices. At the completion of each program, approximately 10% of
the channel sample pulps are submitted to a secondary ISO certified
laboratory for assay verification.

About Houston Lake Mining Inc.

HLM is a mining exploration
company that is specialized in rare metals and actively exploring for
lithium, cesium, tantalum, and rubidium by currently focusing on its
100% owned and optioned PAK Rare Metals Project in northwestern Ontario,
Canada. HLM has a total of 70,236,695 common shares issued and
outstanding. For additional information, please visit www.houstonlakemining.com.

Company Contact Information

Henry J. Kloepper, CEO, Trevor
R. Walker, President

2736 Belisle Drive

Val Caron, ON.

P3N
1B3 CANADA

T. +001 705.897.7622

F. +001
705.897.7618

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on reasonable assumptions, such statements are not guarantees of future
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Houston Lake Mining Inc.

Henry J. Kloepper, +001 705.897.7622

CEO

or

Trevor
R. Walker, +001 705.897.7622

President

F. +001
705.897.7618