Boston Marathon logo
BOSTON MARATHON 2023

Bo Li

Bib: 1460•M

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 11%
Gender (Male)
#0 / 15176
Top 18%
Division (M18-39)
#0 / 5285
Top 40%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
19:32
Rank: #1398
Start → 5K
19:32 | 6:17/mi
10K· 6.21 mi
38:52
Rank: #1392 (+6)
5K → 10K
19:20 | 6:13/mi
15K· 9.32 mi
58:23
Rank: #1436 (-44)
10K → 15K
19:31 | 6:17/mi
20K· 12.43 mi
1:18:25
Rank: #1569 (-133)
15K → 20K
20:02 | 6:27/mi
Half· 13.11 mi
1:22:43
Rank: #1578 (-9)
20K → Half
4:18 | 6:18/mi
25K· 15.53 mi
1:38:25
Rank: #1640 (-62)
Half → 25K
15:42 | 6:29/mi
30K· 18.64 mi
1:59:25
Rank: #1760 (-120)
25K → 30K
21:00 | 6:46/mi
20M
2:08:41
Rank: #1829 (-69)
30K → 20M
9:16 | 6:49/mi
21M
2:16:06
Rank: #1917 (-88)
20M → 21M
7:25 | 7:25/mi
35K· 21.75 mi
2:21:10
Rank: #1975 (-58)
21M → 35K
5:04 | 6:46/mi
23M
2:30:04
Rank: #2058 (-83)
35K → 23M
8:54 | 7:06/mi
24M
2:37:08
Rank: #2152 (-94)
23M → 24M
7:04 | 7:04/mi
40K· 24.85 mi
2:44:54
Rank: #2500 (-348)
24M → 40K
7:46 | 9:05/mi
25.2M
2:47:53
Rank: #2619 (-119)
40K → 25.2M
2:59 | 8:39/mi
Finish· 26.22 mi
2:56:09
Rank: #2964 (-345)
25.2M → Finish
8:16 | 8:07/mi

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:22:43
Pace6:19 /mi
2nd Half
Distance13.11 mi
Time1:33:26
Pace7:08 /mi
📊Positive Split: 13.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:19:5619:326:1719:32
6:17
-
10K
6.21 mi10:39:1638:526:1519:20
6:13
-0:04
15K
9.32 mi10:58:4758:236:1619:31
6:17
+0:04
20K
12.43 mi11:18:491:18:256:1920:02
6:27
+0:10
Half
13.11 mi11:23:071:22:436:194:18
6:18
-0:09
25K
15.53 mi11:38:491:38:256:2015:42
6:29
+0:11
30K
18.64 mi11:59:491:59:256:2421:00
6:46
+0:17
20M
20.00 mi12:09:052:08:416:269:16
6:49
+0:03
21M
21.00 mi12:16:302:16:066:297:25
7:25
+0:36
35K
21.75 mi12:21:342:21:106:295:04
6:46
-0:39
23M
23.00 mi12:30:282:30:046:318:54
7:06
+0:20
24M
24.00 mi12:37:322:37:086:337:04
7:04
-0:02
40K
24.85 mi12:45:182:44:546:387:46
9:05
+2:01
25.2M
25.20 mi12:48:172:47:536:402:59
8:39
-0:26
Finish
26.22 mi12:56:332:56:096:438:16
8:07
-0:32

Checkpoints & Pacing

📈Pace Line

Pace Progression

Track your pace changes throughout the race. Dot colors mark your quickest to easiest segments, relative to your own pace.

Fastest Pace

6:13 /mi

Average Pace

6:43 /mi

Slowest Pace

9:05 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:02:41

36% of race

Time at Steady Pace

1:27:02

49% of race

Time at Slower Pace

26:26

15% of race

Average Pace: 6:43 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

🎨Heatmap

Pace Heatmap

Where you sped up and eased off relative to your own pace across the race. Colors are relative to your own range, not to other runners.

Loading...
0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Click or hover over segments to see details

✨Sparklines

Checkpoint Splits with Pace Trends

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi10:19:5619:326:1719:32
6:17
#1398
10K
6.21 mi10:39:1638:526:1519:20
6:13
#1392
15K
9.32 mi10:58:4758:236:1619:31
6:17
#1436
20K
12.43 mi11:18:491:18:256:1920:02
6:27
#1569
Half
13.11 mi11:23:071:22:436:194:18
6:18
#1578
25K
15.53 mi11:38:491:38:256:2015:42
6:29
#1640
30K
18.64 mi11:59:491:59:256:2421:00
6:46
#1760
20M
20.00 mi12:09:052:08:416:269:16
6:49
#1829
21M
21.00 mi12:16:302:16:066:297:25
7:25
#1917
35K
21.75 mi12:21:342:21:106:295:04
6:46
#1975
23M
23.00 mi12:30:282:30:046:318:54
7:06
#2058
24M
24.00 mi12:37:322:37:086:337:04
7:04
#2152
40K
24.85 mi12:45:182:44:546:387:46
9:05
#2500
25.2M
25.20 mi12:48:172:47:536:402:59
8:39
#2619
Finish
26.22 mi12:56:332:56:096:438:16
8:07
#2964
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi1398132913291579(Top 6%)1507(Top 10%)1507(Top 29%)
10K6.21 mi3.10 mi1392+61326+31326+31449(Top 5%)1383(Top 9%)1383(Top 26%)
15K9.32 mi3.11 mi1436-441371-451371-451579(Top 6%)1507(Top 10%)1507(Top 29%)
20K12.43 mi3.11 mi1569-1331499-1281499-1282036(Top 8%)1955(Top 13%)1955(Top 37%)
Half13.11 mi0.68 mi1578-91508-91508-91824(Top 7%)1753(Top 12%)1753(Top 33%)
25K15.53 mi2.42 mi1640-621570-621570-622065(Top 8%)1979(Top 13%)1979(Top 37%)
30K18.64 mi3.11 mi1760-1201684-1141684-1142741(Top 10%)2603(Top 17%)2603(Top 49%)
20M20.00 mi1.36 mi1829-691748-641748-642931(Top 11%)2756(Top 18%)2756(Top 52%)
21M21.00 mi1.00 mi1917-881834-861834-864169(Top 16%)3821(Top 25%)3821(Top 72%)
35K21.75 mi0.75 mi1975-581891-571891-573962(Top 15%)3637(Top 24%)3637(Top 69%)
23M23.00 mi1.25 mi2058-831974-831974-834313(Top 16%)3932(Top 26%)3932(Top 74%)
24M24.00 mi1.00 mi2152-942065-912065-914977(Top 19%)4395(Top 29%)4395(Top 83%)
40K24.85 mi0.85 mi2500-3482387-3222387-32216528(Top 62%)10353(Top 68%)10353(Top 196%)
25.2M25.20 mi0.35 mi2619-1192499-1122499-11210318(Top 39%)7416(Top 49%)7416(Top 140%)
Finish26.22 mi1.02 mi2964-3452807-3082807-30812810(Top 48%)8664(Top 57%)8664(Top 164%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 6%
×21stories
+97ft-345ft

Overall

1579

Males

1507

M18-39

1507

5K→10K

3.1 - 6.2 mi

Top 5%
×5stories
+79ft-138ft

Overall

1449

Males

1383

M18-39

1383

10K→15K

6.2 - 9.3 mi

Top 6%
×3stories
+67ft-78ft

Overall

1579

Males

1507

M18-39

1507

15K→20K

9.3 - 12.4 mi

Top 8%
×5stories
+106ft-86ft

Overall

2036

Males

1955

M18-39

1955

20K→Half

12.4 - 13.1 mi

Top 7%
×2stories
+19ft-37ft

Overall

1824

Males

1753

M18-39

1753

Half→25K

13.1 - 15.5 mi

Top 8%
×4stories
+66ft-88ft

Overall

2065

Males

1979

M18-39

1979

25K→30K

15.5 - 18.6 mi

Top 10%
×9stories
+181ft-148ft

Overall

2741

Males

2603

M18-39

2603

30K→20M

18.6 - 20.0 mi

Top 11%
×5stories
+64ft-50ft

Overall

2931

Males

2756

M18-39

2756

20M→21M

20.0 - 21.0 mi

Top 16%
×8stories
+106ft-24ft

Overall

4169

Males

3821

M18-39

3821

21M→35K

21.0 - 21.8 mi

Top 15%
×7stories
+17ft-86ft

Overall

3962

Males

3637

M18-39

3637

35K→23M

21.8 - 23.0 mi

Top 16%
×5stories
+23ft-63ft

Overall

4313

Males

3932

M18-39

3932

23M→24M

23.0 - 24.0 mi

Top 19%
×6stories
+12ft-82ft

Overall

4977

Males

4395

M18-39

4395

24M→40K

24.0 - 24.9 mi

Top 62%
×1story
+6ft-20ft

Overall

16528

Males

10353

M18-39

10353

40K→25.2M

24.9 - 25.2 mi

Top 39%
×1story
+13ft-16ft

Overall

10318

Males

7416

M18-39

7416

25.2M→Finish

25.2 - 26.2 mi

Top 48%
×2stories
+22ft-21ft

Overall

12810

Males

8664

M18-39

8664

Passing Analysis

Category:
Athletes Passed
239
Passed By
1805
Net Change
-1566
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#1398
5K → 10K7468+6#1398#1392
10K → 15K3175-44#1392#1436
15K → 20K14147-133#1436#1569
20K → Half514-9#1569#1578
Half → 25K2486-62#1578#1640
25K → 30K24144-120#1640#1760
30K → 20M1786-69#1760#1829
20M → 21M997-88#1829#1917
21M → 35K462-58#1917#1975
35K → 23M22105-83#1975#2058
23M → 24M9103-94#2058#2152
24M → 40K2350-348#2152#2500
40K → 25.2M0119-119#2500#2619
25.2M → Finish4349-345#2619#2964
TOTALS2391805-1566
📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing