Boston Marathon logo
BOSTON MARATHON 2023

Tony Kan

Bib: 25778•M

MI

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M45-49)
#0 / 2252
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
7:35/mi
23:35
↑ 97↓ 3451.5%
10K· 6.21 mi
7:46/mi
47:43
↑ 79↓ 1380.4%
15K· 9.32 mi
8:14/mi
1:13:17
↑ 67↓ 78
20K· 12.43 mi
8:20/mi
1:39:11
↑ 106↓ 860.1%
Half· 13.11 mi
8:27/mi
1:44:57
↑ 19↓ 370.5%
25K· 15.53 mi
8:44/mi
2:06:07
↑ 66↓ 880.2%
30K· 18.64 mi
9:02/mi
2:34:10
↑ 181↓ 1480.2%
20M
9:15/mi
2:46:44
↑ 64↓ 500.2%
21M
9:57/mi
2:56:41
↑ 106↓ 241.6%
35K· 21.75 mi
8:59/mi
3:03:24
↑ 17↓ 861.7%
23M
9:36/mi
3:15:25
↑ 23↓ 630.6%
24M
9:10/mi
3:24:35
↓ 821.3%
40K· 24.85 mi
9:21/mi
3:32:35
↓ 200.3%
25.2M
9:52/mi
3:35:59
↑ 13↓ 160.2%
Finish· 26.22 mi
9:02/mi
3:45:11
↑ 22↓ 21

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
Time1:44:57
Pace8:00 /mi
2nd Half
Distance13.11 mi
Time2:00:14
Pace9:10 /mi
📊Positive Split: 14.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:38:5923:357:3523:35
7:35
-
10K
6.21 mi12:03:0747:437:4124:08
7:46
+0:11
15K
9.32 mi12:28:411:13:177:5225:34
8:14
+0:28
20K
12.43 mi12:54:351:39:117:5925:54
8:20
+0:06
Half
13.11 mi13:00:211:44:578:005:46
8:27
+0:07
25K
15.53 mi13:21:312:06:078:0721:10
8:44
+0:17
30K
18.64 mi13:49:342:34:108:1628:03
9:02
+0:18
20M
20.00 mi14:02:082:46:448:2012:34
9:15
+0:13
21M
21.00 mi14:12:052:56:418:259:57
9:57
+0:42
35K
21.75 mi14:18:483:03:248:266:43
8:59
-0:58
23M
23.00 mi14:30:493:15:258:3012:01
9:36
+0:37
24M
24.00 mi14:39:593:24:358:319:10
9:10
-0:26
40K
24.85 mi14:47:593:32:358:338:00
9:21
+0:11
25.2M
25.20 mi14:51:233:35:598:343:24
9:52
+0:31
Finish
26.22 mi15:00:353:45:118:369:12
9:02
-0:50

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

7:35 /mi

Average Pace

8:36 /mi

Slowest Pace

9:57 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:44:57

47% of race

Time at Steady Pace

1:34:52

42% of race

Time at Slower Pace

25:22

11% of race

Average Pace: 8:35 /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 mi11:38:5923:357:3523:35
7:35
#10446
10K
6.21 mi12:03:0747:437:4124:08
7:46
#11611
15K
9.32 mi12:28:411:13:177:5225:34
8:14
#13245
20K
12.43 mi12:54:351:39:117:5925:54
8:20
#13947
Half
13.11 mi13:00:211:44:578:005:46
8:27
#14157
25K
15.53 mi13:21:312:06:078:0721:10
8:44
#14773
30K
18.64 mi13:49:342:34:108:1628:03
9:02
#15253
20M
20.00 mi14:02:082:46:448:2012:34
9:15
#15476
21M
21.00 mi14:12:052:56:418:259:57
9:57
#15620
35K
21.75 mi14:18:483:03:248:266:43
8:59
#15701
23M
23.00 mi14:30:493:15:258:3012:01
9:36
#15936
24M
24.00 mi14:39:593:24:358:319:10
9:10
#16030
40K
24.85 mi14:47:593:32:358:338:00
9:21
#16097
25.2M
25.20 mi14:51:233:35:598:343:24
9:52
#16110
Finish
26.22 mi15:00:353:45:118:369:12
9:02
#16214
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi104468380838016057(Top 60%)10713(Top 71%)10713(Top 476%)
10K6.21 mi3.10 mi11611-11658938-5588938-55812837(Top 48%)9487(Top 63%)9487(Top 421%)
15K9.32 mi3.11 mi13245-16349626-6889626-68816057(Top 60%)10713(Top 71%)10713(Top 476%)
20K12.43 mi3.11 mi13947-7029878-2529878-25215838(Top 59%)10571(Top 70%)10571(Top 469%)
Half13.11 mi0.68 mi14157-2109963-859963-8517411(Top 65%)11245(Top 74%)11245(Top 499%)
25K15.53 mi2.42 mi14773-61610185-22210185-22217521(Top 66%)11203(Top 74%)11203(Top 497%)
30K18.64 mi3.11 mi15253-48010321-13610321-13617318(Top 65%)11043(Top 73%)11043(Top 490%)
20M20.00 mi1.36 mi15476-22310381-6010381-6017766(Top 67%)11123(Top 73%)11123(Top 494%)
21M21.00 mi1.00 mi15620-14410408-2710408-2717832(Top 67%)11150(Top 73%)11150(Top 495%)
35K21.75 mi0.75 mi15701-8110422-1410422-1417790(Top 67%)11046(Top 73%)11046(Top 490%)
23M23.00 mi1.25 mi15936-23510491-6910491-6918706(Top 70%)11441(Top 75%)11441(Top 508%)
24M24.00 mi1.00 mi16030-9410526-3510526-3517911(Top 67%)11029(Top 73%)11029(Top 490%)
40K24.85 mi0.85 mi16097-6710550-2410550-2417754(Top 67%)10913(Top 72%)10913(Top 485%)
25.2M25.20 mi0.35 mi16110-1310554-410554-416754(Top 63%)10440(Top 69%)10440(Top 464%)
Finish26.22 mi1.02 mi16214-10410580-2610580-2618089(Top 68%)11118(Top 73%)11118(Top 494%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 60%
×21story building
+97ft-345ft

Overall

16057

Males

10713

M45-49

10713

5K→10K

3.1 - 6.2 mi

Top 48%
×5story building
+79ft-138ft

Overall

12837

Males

9487

M45-49

9487

10K→15K

6.2 - 9.3 mi

Top 60%
×3story building
+67ft-78ft

Overall

16057

Males

10713

M45-49

10713

15K→20K

9.3 - 12.4 mi

Top 59%
×5story building
+106ft-86ft

Overall

15838

Males

10571

M45-49

10571

20K→Half

12.4 - 13.1 mi

Top 65%
×2story building
+19ft-37ft

Overall

17411

Males

11245

M45-49

11245

Half→25K

13.1 - 15.5 mi

Top 66%
×4story building
+66ft-88ft

Overall

17521

Males

11203

M45-49

11203

25K→30K

15.5 - 18.6 mi

Top 65%
×9story building
+181ft-148ft

Overall

17318

Males

11043

M45-49

11043

30K→20M

18.6 - 20.0 mi

Top 67%
×5story building
+64ft-50ft

Overall

17766

Males

11123

M45-49

11123

20M→21M

20.0 - 21.0 mi

Top 67%
×8story building
+106ft-24ft

Overall

17832

Males

11150

M45-49

11150

21M→35K

21.0 - 21.8 mi

Top 67%
×7story building
+17ft-86ft

Overall

17790

Males

11046

M45-49

11046

35K→23M

21.8 - 23.0 mi

Top 70%
×5story building
+23ft-63ft

Overall

18706

Males

11441

M45-49

11441

23M→24M

23.0 - 24.0 mi

Top 67%
×6story building
+12ft-82ft

Overall

17911

Males

11029

M45-49

11029

24M→40K

24.0 - 24.9 mi

Top 67%
×1story
+6ft-20ft

Overall

17754

Males

10913

M45-49

10913

40K→25.2M

24.9 - 25.2 mi

Top 63%
×1story
+13ft-16ft

Overall

16754

Males

10440

M45-49

10440

25.2M→Finish

25.2 - 26.2 mi

Top 68%
×2story building
+22ft-21ft

Overall

18089

Males

11118

M45-49

11118

Passing Analysis

Category:
Athletes Passed
477
Passed By
6245
Net Change
-5768
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10446
5K → 10K441209-1165#10446#11611
10K → 15K101644-1634#11611#13245
15K → 20K50752-702#13245#13947
20K → Half3213-210#13947#14157
Half → 25K36652-616#14157#14773
25K → 30K62542-480#14773#15253
30K → 20M30253-223#15253#15476
20M → 21M48192-144#15476#15620
21M → 35K24105-81#15620#15701
35K → 23M30265-235#15701#15936
23M → 24M46140-94#15936#16030
24M → 40K36103-67#16030#16097
40K → 25.2M2437-13#16097#16110
25.2M → Finish34138-104#16110#16214
TOTALS4776245-5768
📊

Passing Visuals

Category:
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

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing