diff --git a/boards/winterbloom_binary_star/board.mk b/boards/winterbloom_binary_star/board.mk
new file mode 100644
index 00000000..38d54be0
--- /dev/null
+++ b/boards/winterbloom_binary_star/board.mk
@@ -0,0 +1,2 @@
+CHIP_FAMILY = samd51
+CHIP_VARIANT = SAMD51J20A
diff --git a/boards/winterbloom_binary_star/board_config.h b/boards/winterbloom_binary_star/board_config.h
new file mode 100644
index 00000000..c9735e4e
--- /dev/null
+++ b/boards/winterbloom_binary_star/board_config.h
@@ -0,0 +1,30 @@
+#ifndef BOARD_CONFIG_H
+#define BOARD_CONFIG_H
+
+#define VENDOR_NAME "Winterbloom"
+#define PRODUCT_NAME "Binary Star"
+#define VOLUME_LABEL "STARBOOT"
+#define INDEX_URL "http://binarystar.wntr.dev"
+#define BOARD_ID "SAMD51J20A-BinaryStar-v0"
+
+// Allocated at https://github.com/adafruit/circuitpython/issues/4104
+#define USB_VID 0x239A
+#define USB_PID 0x00F5
+
+#define LED_PIN PIN_PA23
+
+#define BOARD_RGBLED_CLOCK_PIN PIN_PB09
+#define BOARD_RGBLED_DATA_PIN PIN_PA04
+
+#define BOOT_USART_MODULE SERCOM3
+#define BOOT_USART_MASK APBAMASK
+#define BOOT_USART_BUS_CLOCK_INDEX MCLK_APBBMASK_SERCOM3
+#define BOOT_USART_PAD_SETTINGS UART_RX_PAD1_TX_PAD0
+#define BOOT_USART_PAD3 PINMUX_UNUSED
+#define BOOT_USART_PAD2 PINMUX_UNUSED
+#define BOOT_USART_PAD1 PINMUX_PA22C_SERCOM3_PAD0
+#define BOOT_USART_PAD0 PINMUX_PA23C_SERCOM3_PAD1
+#define BOOT_GCLK_ID_CORE SERCOM3_GCLK_ID_CORE
+#define BOOT_GCLK_ID_SLOW SERCOM3_GCLK_ID_SLOW
+
+#endif