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Riverside Samples 7.30 g/t Gold from Rock Samples Along a 0.8 km Transect Expanding Target Zone at the Cecilia Project in Sonora, Mexico

Drill Results Exploration Programs Sampling & Geoscience Results

Riverside Samples 7.30 g/t Gold from Rock

Samples Along a 0.8 km Transect Expanding

Target Zone at the Cecilia Project in Sonora,

Mexico

Vancouver, British Columbia--(Newsfile Corp. - December 20, 2023) -

Riverside Resources

Inc.

(TSXV: RRI) (OTCQB: RVSDF) (FSE: 5YY) ("Riverside" or the "Company"),

is pleased to

report on rock sampling and fieldwork from the Cecilia Gold-Silver Project (the "Project") in Sonora,

Mexico.

The results fit within the larger context of a district scale gold-silver composite dome system with

superimposed gold-rich veins.

Past drilling by Riverside intercepted high-grade gold in 4 of the 7 holes

and this sampling over new areas, doubles the strike of the defined mineralization footprint This large

footprint is consistent with other rhyolite dome gold systems including those in New Mexico like Mogollon

and in Sonora like at La India mine of Agnico Eagle.

Key Highlights:

34 rock samples were collected at the primary targets.

22 samples in the main target "Cerro Magallanes" confirming Au grades up

7.3 g/t Au and Ag >

100 g/t.

Five (5) primary structural trends were identified with field data and historic geochemical data

reprocessing.

Updated drilling permits, valid for the next several years, have been obtained along with signed

agreements for surface access over the targets.

Riverside collected rock chip samples from selective areas along 0.8 km length in the Magallanes

Target area that returned gold values in assays up to 7.3 g/t Au and 144 g/t Ag (

Figure 1A., Table 1

).

The sampling confirms the consistent Au grades obtained in past surface workings and diamond core

drilling that includes 24.2m @1.51 g/t Au in CED21-005 by the Company. The mapping and exploration

activities combined with data reprocessing allows the company geologists to define the main structural

trends (Agua Prieta, San Jose, North Breccia, Central and East trends) that are the main mineral

corridors (

Figure 2

).

The structural trends are interpreted as the surface expression of a rooted rhyolite

dome system where higher grades lie at the base of the hill (

Figure 1B

). The geochemical data

obtained, and the geologic mapping are helpful to refine the geological model for the deposit type and

target delineation for the next drill program planned for 2024.

Figure 1. A. Plan view map of the Magallanes Target with some of the new geochemical sampling done

recently and the defined structural trends. B. Schematic cross-section interpreting the convergence of the

structural trends into the root of a mineralized rhyolite composite dome system (like those found at

Yanacocha, Peru and San Julian, Mexico).

To view an enhanced version of this graphic, please visit:

https://images.newsfilecorp.com/files/6101/191682_riversidefig1.jpg

Table 1: Selected assay results from Riverside's recent sampling at Cecilia.

Area

East

North

Elevation

Sample Type

Au_g/t

Ag_g/t

Cerro Magallanes

612215

3436934

1779

selected

7.3

144

Cerro Magallanes

611598

3436932

2165

selected

6.18

9.21

Cerro Magallanes

612362

3437066

1711

dump

3.87

38.7

Cerro Magallanes

611469

3436911

2167

chip

2.64

1.33

Cerro Magallanes

611425

3436898

2133

chip

2.08

2.3

Cerro Magallanes

611935

3436954

1936

chip

1.86

12.65

La Cruz

615365

3438484

1431

chip

1.63

3.29

Figure 2. North-looking oblique aerial photograph of the Magallanes Dome Complex with different

targets. The dashed red lines indicate the trends that control -mineralization and that are interpreted to

be rooted in the central portion of the dome creating the next focused drill targeting.

To view an enhanced version of this graphic, please visit:

https://images.newsfilecorp.com/files/6101/191682_riversidefig2.jpg

Cecilia Project

The Cecilia project consists of six mineral concessions, collectively covering over 77 sq km (7,739

hectares) in size, thus a large district covered by the Company. The Project is located 40 kilometers

southwest of the Agua Prieta border between Mexico and the USA, and 50 kilometers east of Mexico's

largest mining complex, Cananea copper mining complex producing the largest amount of copper in

Mexico.

In the Cecilia Project, the rhyolitic tuffs and dome complex units intrude and unconformably overlie a

sequence of marine clastic sedimentary rocks consisting of interbedded siltstone and sandstone of the

Cretaceous Cabullona Group which hosts gold mineralization in other portions of northern Sonora as

well as here at Cecilia.

The age of the mineralization obtained by Riverside yielded ca. 18 Ma using U-

Pb in zircons in syn-volcanic mineralized rhyolite flow dome in the top of the sequence. This age for

mineralization tied to magmatism has also been reported in large Au camps in Arizona (e.g. Oatman

area, DeWitt et al.,1986).

Riverside work in the district has developed additional targets including the Cruz 1, Cruz 2, Cruz 3, Casa

de Piedra, Los Llanos, and Magallancito targets (Figure 3).

These targets represent different levels of

exposure and make the Cecilia project a potential district for multiple gold discoveries.

Figure 3. Map of the district by Riverside with areas of clustering with gold mineralization and targets

shown. Stratigraphic column with targets in stars for location in the stratigraphy similar to other major

rhyolite dome districts where multiple targets in diverse structural settings.

To view an enhanced version of this graphic, please visit:

https://images.newsfilecorp.com/files/6101/191682_riversidefig3.jpg

Qualified Person & QA/QC:

The scientific and technical data contained in this news release pertaining to the Cecilia Project was

reviewed and approved by Julian Manco, P.Geo, a non-independent qualified person to Riverside

Resources focusing on the work in Sonora, Mexico, who is responsible for ensuring that the information

provided in this news release is accurate and who acts as a "qualified person" under National Instrument

43-101 Standards of Disclosure for Mineral Projects.

Rock samples from the exploration program discussed above at Cecilia were taken to the Bureau

Veritas Laboratories in Hermosillo, Mexico for fire assaying for gold. The rejects remained with Bureau

Veritas in Mexico while the pulps were transported to Bureau Veritas laboratory in Vancouver, BC,

Canada for 45 element ICP/ES-MS analysis. A QA/QC program was implemented as part of the

sampling procedures for the exploration program. Standard samples were randomly inserted into the

sample stream prior to being sent to the laboratory.

About Riverside Resources Inc.:

Riverside is a well-funded exploration company driven by value generation and discovery. The Company

has over $6M in cash, no debt, and less than 75M shares outstanding with a strong portfolio of gold-

silver and copper assets and royalties in North America. Riverside has extensive experience and

knowledge operating in Mexico and Canada and leverages its large database to generate a portfolio of

prospective mineral properties. In addition to Riverside's exploration spending, the Company also

strives to diversify risk by securing joint-venture and spin-out partnerships to advance multiple assets

simultaneously and create more chances for discovery. Riverside has properties available for option,

with information available on the Company's website at

www.rivres.com

.

ON BEHALF OF RIVERSIDE RESOURCES INC.

"John-Mark Staude"

Dr. John-Mark Staude, President & CEO

For additional information contact:

John-Mark Staude

President, CEO

Riverside Resources Inc.

[email protected]

Phone: (778) 327-6671

Fax: (778) 327-6675

Web:

www.rivres.com

Mehran Bagherzadeh

Corporate Communications

Riverside Resources Inc.

[email protected]

Phone: (778) 327-6671

TF: (877) RIV-RES1

Web:

www.rivres.com

Certain statements in this press release may be considered forward-looking information. These

statements can be identified by the use of forward-looking terminology (e.g., "expect"," estimates",

"intends", "anticipates", "believes", "plans"). Such information involves known and unknown risks --

including the availability of funds, the results of financing and exploration activities, the interpretation

of exploration results and other geological data, or unanticipated costs and expenses and other risks

identified by Riverside in its public securities filings that may cause actual events to differ materially

from current expectations. Readers are cautioned not to place undue reliance on these forward-

looking statements, which speak only as of the date of this press release.

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.

To view the source version of this press release, please visit

https://www.newsfilecorp.com/release/191682