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Frontier Lithium PFS work indicates favourable ground conditions for potential open pit structure at PAK Lithium Project

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General Office

2736 Belisle Drive

Val Caron, ON P3N 1B3

T. 705.897.7622

F. 705.897.7618

Frontier Lithium PFS work indicates favourable ground conditions for

potential open pit structure at PAK Lithium Project

Sudbury, Ontario, June 22, 2017 – Frontier Lithium Inc. (TSX.V: FL) (the “Company”) is pleased to

announce new drilling results for its PAK Lithium Project, in the Red Lake mining district. As part of ongoing

Pre-Feasibility Study (PFS) activities, the design brief, conducted by Golder Associates (Sudbury, ON,

Canada) and based on the 2017 winter drilling program, outlined slope design recommendations for the

Company’s lithium deposit and indicated favourable conditions for an open pit structure.

In March 2017, Frontier successfully completed four (4) geomechanical drill holes with core orientation and

packer testing which was followed by laboratory strength testing. For the purpose of Frontier’s pre-feasibility

study, results of the program suggest that rock mass failure should not be a concern given the very strong

intact rock strength of proposed pit walls for an open pit up to 200m deep. Slope design will be controlled by

the stability of individual benches, meaning the quality of blasting and the prevalence of structures that

undercut the bench face angle. Should Frontier perform a future Definitive Feasibility Study, it has been

recommended that some additional drilling be performed by the Company.

Frontier also successfully conducted twenty-two (22) sampled boreholes for the soils geotechnical data

collection program for the PFS design of a Tailings Management Facility (TMF), as well, fifteen (15)

monitoring wells were successfully installed for a baseline hydrogeology study being conducted on the

Project.

"These studies indicate that the ground conditions and general site topography seem to provide favourable

conditions for a low cost mining scenario with potential open pit operations at the PAK Lithium Project,"

remarked Trevor Walker, President and CEO of Frontier.

In addition, the Company confirms it has successfully converted the mining claim where the Pakeagama Lake

Deposit is located into a twenty-one (21) year lease agreement by the Province of Ontario.

Mr. Garth Drever, P.Geo., is the "Qualified Person" for Frontier defined under NI 43-101 and has reviewed

and approved the technical information contained in this news release.

Company Contact Information

Trevor R. Walker, President & CEO

2736 Belisle Drive

Val Caron, ON.

P3N 1B3 CANADA

T. +001 705.897.7622

F. +001 705.897.7618

General Office

2736 Belisle Drive

Val Caron, ON P3N 1B3

T. 705.897.7622

F. 705.897.7618

Media Requests

Joseph Mansourian

Manager, Investor Relations

2736 Belisle Drive

Val Caron, ON.

P3N 1B3 CANADA

T. +001 705.618.0070

F. +001 705.897.7618

About Frontier Lithium Inc.

Frontier’s goal is to become a low-cost, fully integrated lithium and tantalum producer through

development of the PAK lithium deposit in Ontario, Canada. Frontier maintains a tight share structure with

management ownership exceeding 30% of the Company. CAD $4.5 million of exploration work has been

conducted from 2013 to 2017 on the deposit which boasts its lithium in a rare, high-purity, low-iron

spodumene. The Company has adopted a staged growth approach to exploration and development in

order to avoid unnecessary share dilution – a strategic imperative for the Company. The initial target

market is the glass-ceramic industry which consumes roughly one-third of global lithium supply and is

currently faced with monopolistic conditions, coupled with major lithium producers increasingly directing

output toward supporting battery manufacture.

Ceramic/glass customers prefer to source technical-grade (low-iron) spodumene concentrate in excess of

7% lithium oxide (Li2O), if available, to avoid inferior lower grade petalite concentrates, or paying much

higher prices for battery grade lithium compounds.

The PAK lithium deposit remains open in all directions and Company Management believes the resource

can be developed into a world-class operation. The Company is currently conduction pre-feasibility to

produce lithium concentrates. If production of lithium concentrates can be established from Frontier, the

possible second stage of investment and longer term prospect is to further process some of PAK’s output

to produce the higher purity lithium compounds required for lithium battery technologies used in the

electrification of transportation and electric grid storage applications.

About the PAK Lithium Project

The PAK Lithium Project lies close to the boundary between two geological sub-provinces of the western

Superior geologic province in northwestern Ontario and hosts a rare metals pegmatite deposit. The

deposit is an LCT (lithium- cesium- tantalum) type pegmatite. These types of pegmatites have been the

principal source of hard rock lithium, tantalum, rubidium and cesium ores mined in the world but there are

comparatively few commercially-viable deposits.

Frontier is actively exploring its 100% owned project which contains the Pakeagama Lake pegmatite. The

PAK deposit is one of the highest grade lithium mineral resources in North America which has a current

General Office

2736 Belisle Drive

Val Caron, ON P3N 1B3

T. 705.897.7622

F. 705.897.7618

Measured and Indicated Resource of 7.89 million tonnes of 1.73% Li2O equivalent (eq.) or 1.58% Li20

and 104 ppm Ta2O5 and an Inferred Resource of 295,600 tonnes of 1.35% Li2O eq. or 1.20% Li2O and

103 ppm Ta2O5 which has a technical/ceramic grade spodumene with low inherent iron (below 0.1%

Fe2O3). The deposit has adjacent zones that are enriched in tantalum and rubidium. Frontier is also

evaluating the phased co-production of tantalum and mica-product concentrates once lithium mineral

production has been commercialized.

The deposit now has a known 500m strike length with an estimated true width varying from 10m to 125m

with a sub-vertical orientation. The resource remains open to depth and along strike to the northwest and

southeast.

Additional information regarding Frontier Lithium is available on SEDAR at www.sedar.com under the

Company's profile and on its website at www.frontierlithium.com, including various pictures of ongoing

work at the project.

Neither the TSX Venture Exchange 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.

-End-

General Office

2736 Belisle Drive

Val Caron, ON P3N 1B3

T. 705.897.7622

F. 705.897.7618