Eleocharis bolanderi is a species of spikesedge known by the common name Bolander's spikerush. It is native to the western United States from Colorado west to Oregon and California. It grows in wet spots in several types of habitat, including mountain meadows and springs. It is a rhizomatous perennial herb producing erect, hairless stems 10 to 30 centimeters tall. The narrow, wispy leaves often have purple or reddish speckles and purplish tinting around the bases. The inflorescence is an oval-shaped spikelet at the tip of the stem under a centimeter long and made up of several dark brown, sometimes purple-tinged flowers.