There are lots of cool green events coming up in the next few weeks, including hikes and runs along the green corridor, a clean-up at Pulau Ubin and a cycling event to commemorate World Water Day. Check them out:

Let's Hike! 11: Cherishing the Green Corridor (Feb 27)

Its previous event was so popular that the organizers are holding it again, so if you missed the first last hike, you should grab your gear and go. The approximately 22.1 kilometer walk starts at 8:30am at Kranji MRT Station, and ends at Kampong Bahru near SGH. One thing to note: this five-hour long event is not for beginners, so water and good hiking shoes are a a must. Sign up here. Free.

Pulau Ubin Forest Clean Up (Feb 27)

The environmentally conscious can go on a forest clean-up organized by the Nature Society of Singapore. You'll learn of the harmful effects pollution has on the island and what you can do to help. This outing is only limited to 30 people and starts from 9am-12pm. Be prepared to rise early. While details are scant at the moment, you can keep tabs on this event on Facebook. Register here. Free.

Green Ultra Race (Feb 27)

If hiking is not your thing, the Green Race Ultra Challenge’s may be the event to up your running game. The 9.3km route goes through some parts of the Green corridor, the Berlukar hills and Kampong trails around the island. There’s also the option to run through it for eight hours to test your limits. $45-85

Love MacRitchie Tours (Mar 6,12,13,20,27)

Photo credit: Love Our MacRitchie Forest

Get up close and personal with nature in 2016 as the NUS Toddycats, the Cicada Tree Eco Space and the BES Drongos will be conducting fortnightly tours at MacRitchie's.The tours are a response to LTA’s announcement of the new Cross Island Line MRT (CRL), which will run through this ecosystem. The walks let you check out various parts of MacRitchie's diverse habitats (all with minimal disturbance, of course). Trails include the Petai Trail Walk, the Venue Loop Walk and the TreeTrop Walk. Free.

Green Corridor Run (Mar 6)

The Green Corridor Run is the last run to ever take place there, so if you can't make the first two, then this one's really your last chance. This 10.5km route stretches from Keppel Road to Bukit Timah/Rifle Range Road. You can register as an individual or a team ($58 and $52.20 per person respectively). There's a special category this year called the Keppel Land Water Challenge, which coincides with World Water Day. Participants carry three to five liters of water across the same distance to a ceremonial well. $1 will be donated for each liter poured in, to raise awareness for people with difficulty accessing portable water.

(Re)cycle 50 (Mar 20)

If you like cycling, then this event may be for you. Held at the Punggol waterway and in conjunction with Singapore World Water Day, this event is all about creating awareness of re-using and recycling bicycles and their parts. According to their peatix page, 50 gallons of water is saved as per one recycled bicycle. Don't worry if you're not physically fit; there's still time to gear up for this 18.47km race. $15.