Mr. Donald Clark reports

RT MINERALS CORP. ANNOUNCES THE DISCOVERY OF SURFACE OUTCROPS OF GREEN CARBONATE AND DRILLING UPDATE AT LINK-CATHARINE GOLD PROPERTY, KIRKLAND LAKE, ONTARIO

Drilling at RT Minerals Corp.'s Link-Catharine gold property has now collared hole CA-21-03 after having completed the first two holes of the current program CA-21-01 and CA-21-02, as summarized herein. The first phase of drill-bit exploration for 2021 consists of a contemplated seven-hole drill program. The drill program is testing several anomalies outlined by a 3-D distributed array induced polarization geophysical survey completed for the company in January, 2021.

Significant green carbonate, mafic-ultramafic surface outcropping discovered

In addition to the included drilling update, RT Minerals has discovered two significant and separate surface outcrops that host the favourable mafic, ultramafic and green carbonate package with narrow quartz veining and sulphides. Several one-kilogram to four-kilogram samples have been taken from these newly discovered outcrops. The outcrops were discovered during drill rig mobilization and will now be entirely stripped and sampled to determine the surface dimension and potential for at-surface mineralization. The outcrops appear to be part of the same favourable geologic package that the company is drilling to depth, as described herein.

Update on drill hole CA-21-01

The first hole of the phase one drill program, CA-21-01, has intersected the favourable mafic, ultramafic and green carbonate-fuchsitic geologic package from 45 metres to 233 metres. This section consists of intermittent and primarily narrow quartz veining and alteration containing mostly trace and up to 3 per cent fine pyrite, with one two-metre interval containing 4 per cent to 10 per cent fine pyrite. A subsection totalling approximately 54 m located (from 183 m to 237 m) is viewed by the company as being host to the more prospective geology and sulphide mineralization within CA-20-01. The hole was stopped at a depth of 240 m.

Update on drill hole CA-21-02

CA-21-02 has intersected the favourable ultramafic package consisting primarily of ultramafics with some intermittent green carbonate. Approximately 55 m of the 168-metre hole contains intermittent narrow quartz veining with less than 2 per cent of fine sulphides. The hole was stopped at 168 m in core length.

Update on drill hole CA-21-03

Drilling has now commenced on drill hole CA-21-03, having reached approximately 25 m in total depth as at the date of this news release. From the drill collar and throughout the first 25 m, drill hole CA-21-03 has intersected the favourable ultramafic package consisting of green carbonate-fuchsitic host. This 25-metre section is associated with quartz veining and sulphides, visually akin to those observed in drill hole CA-20-01 during drilling in the fourth quarter of 2020. Hole CA-21-03 is testing the east-to-west width and dip of the gold-bearing green carbonate-fuchsite previously encountered in CA-20-01. In addition, the current drill hole, CA-21-03, will also drill in proximity through the three en-echelon gold sections announced Dec. 1, 2020, by the company to ascertain the potential to connect these sections at depth. Drill hole CA-21-03 is planned to target an end-depth of 400 m.

Drill hole Locations

The drill collars of the three holes are spaced about 180 m apart on two separate subparallel 3-D IP survey targets. The holes are orientated to drill generally perpendicular or on an oblique orientation to intersect the north-south-trending gold-bearing mafic, ultramafic and green carbonate package, which generally appears at this point in time to align and correlate with the anomalies identified by the previously announced 3-D IP survey.

Drill core from the holes and samples from the newly discovered outcrops are being prepared for assay submission.

The Link-Catharine gold property is located approximately 25 kilometres southeast of Kirkland Lake, Ont., within an infrastructure-rich area. The project is the subject of an earn-in option agreement, as announced by the company on Sept. 29, 2020, under which RT Minerals may earn up to 100-per-cent interest, subject to a 2-per-cent net smelter return royalty.

Qualified person

Garry Clark, PGeo, is the qualified person for RT Minerals and he has reviewed and approved the technical content of this press release.

About RT Minerals Corp.

RT Minerals is a junior exploration company listed on the TSX Venture Exchange under the symbol RTM. The company currently has 43,122,988 shares outstanding. RT Minerals holds a 100-per-cent interest in the Norwalk gold property located near Wawa, Ont. The company also holds an option to acquire 100-per-cent interest in the Link-Catharine RLDZ gold property with a total area of 544 acres, and subject to shareholder and regulatory approval, RT Minerals will acquire control of a 100-per-cent interest in a further 24,536 acres of mineral properties (subject to a 2-per-cent gross smelter return royalty) that adjoin the RT Minerals Link-Catharine property. Consideration to be paid for these properties will be the issuance of 21 million Tier 2 surplus escrow shares (subject to a 36-month escrow release format) under the proposed acquisition of Catharine Gold Inc., as announced by the company by news release dated March 24, 2021.

We seek Safe Harbor.