Let’s Do This - Running, Cycling, Triathlon, Obstacle and Swimming Events in the United States

Why people book with us

5* Customer service

Round-the-clock service from our support team of event registration specialists

Best price guarantee

Find your event for less? We’ll match the price and give you a $50 voucher

Easy entry

The events might be hard, but our booking process is easy, delightful and secure

No hassle refunds

You can cancel any booking up until 4 days before due to injury

Unique insights from attendees

Learn from over 20,000 event reviews written by the Let’s Do This community

Golden Gate Trail Run – Winter

I loved the beautiful course! So much fun doing the race with my friends, we mostly hiked and did some running downhills :)

Surfers Point Marathon, Half, 10k & 5k

This course is nice because it is relatively flat, although there are a few minor inclines to test the legs. I ran the marathon and the out and back (x2) format was a little difficult mentally but the cool ocean breeze and the ocean views made for a very nice...

Best Damn Race – Safety Harbour

I have ran BDR Orlando the last2 years (plus next month) and really enjoy all the extras. The free photos, good food (although it has been slipping) and the awesome medals. This race I really enjoyed the instant tickets showing my times. I taped it to the…

Popular events near United States

Registration Perks

Take to the streets and race through Berkeley this fall! It’s like a big city marathon with a small town feel.

Our scenic course is comfortable for runners of all levels - do not miss out on the community, friendships, and celebration this fall during the Berkeley Half Marathon!

Berkeley Half Marathon

15th Nov • Pacific Tech, 2710 Martin Luther King Jr Way, Berkeley, CA 94703, USA

4 races

Berkeley Half Marathon

Toughest Mudder is guaranteed to push you past anything you’ve ever experienced before, and this year you can share the glory, if you choose, in one of our all-new 2 or 4 person Team Relay formats. Assemble your crew and see if they really are as tough as nails.

Wanna take it one step further? Hit the dedicated miles attached to Male, Female and Team Relay to qualify for Contender status at World’s Toughest Mudder.

America’s Toughest Mudder South Regional is proof that everything is bigger (and better) in Texas. An insane course packed with winding ATV trails and deep woods that turn into open fields and back again is waiting at TexPlex Park, just 30 minutes from Downtown Dallas. Leave your excuses at home and get on course to push past your limits, and take a chance at podium glory.

World's Toughest Mudder – Dallas Ft Worth

7th Nov • TexPlex Park, 881 Miller Rd, Midlothian, TX 76065, USA

1 race

World's Toughest Mudder – Dallas Ft Worth

Same Epic Venue, Brand New Course

Tough Mudder Classic SoCal is invading Lake Elsinore, and it’s gonna be insane. The rocky, lakeside terrain might be beautiful, but don’t let that fool you. This is one mud soaked, obstacle packed course that’s gonna push you and your crew past your limits. Perfectly located between LA and San Diego, Lake Elsinore is the best place to be to test your toughness, and have a blast doing it.

Tough Mudder 5K: 3 miles, 13 obstacles

Tough Mudder Classic: 8-10 miles, 25 obstacles

Tougher Mudder: Same course as the Classic, but competitively timed.

Tough Mudder – Socal

14th Nov • 32260 Mission Trail, Lake Elsinore, CA 92530, USA

5 races

Tough Mudder – Socal

Our mission is to help people discover epic experiences

Let’s Do This was founded in 2016 to make it easier for people to find their perfect race. We have offices in London and San Francisco and are backed by Y Combinator, NFX, and a number of leading Angel Investors.

Learn more about our team

“I’ve seen first-hand the incredible impact these events can have on making people fitter, healthier and happier. I love that Let’s Do This is not only making events like these more accessible but also helping to support athletes of all different fitness levels.”

Serena Williams

22-time Grand Slam Champion
Let’s Do This investor

“Throughout my career I’ve been lucky enough to inspire people to follow their dreams, get off the couch and get exercising. That’s what attracted me to Let’s Do This. It’s a company that is totally committed to changing the world and inspiring more people to get out there.”

Usain Bolt

World Record holder 100m, 200m and 4x100m
Let’s Do This investor

“The work Let’s Do This is doing to encourage more people to take part, from deeply personal support, to giving you a full refund due to injury, is truly awesome and so when the opportunity arose to invest I was delighted to be involved.”

Paula Radcliffe

Marathon world record holder, 2002 - 2019
Let’s Do This investor