Boston Marathon logo
BOSTON MARATHON 2023

Akira Ichikawa

Bib: 14277•M

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Top 36%
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Top 40%
Division (M55-59)
#0 / 1422
Top 21%
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
7:39/mi
23:45
↑ 97↓ 3451.5%
10K· 6.21 mi
7:36/mi
47:21
↑ 79↓ 1380.4%
15K· 9.32 mi
7:28/mi
1:10:32
↑ 67↓ 78
20K· 12.43 mi
7:44/mi
1:34:35
↑ 106↓ 860.1%
Half· 13.11 mi
7:33/mi
1:39:44
↑ 19↓ 370.5%
25K· 15.53 mi
7:36/mi
1:58:09
↑ 66↓ 880.2%
30K· 18.64 mi
8:05/mi
2:23:15
↑ 181↓ 1480.2%
20M
7:41/mi
2:33:42
↑ 64↓ 500.2%
21M
8:19/mi
2:42:01
↑ 106↓ 241.6%
35K· 21.75 mi
7:38/mi
2:47:44
↑ 17↓ 861.7%
23M
7:47/mi
2:57:29
↑ 23↓ 630.6%
24M
7:30/mi
3:04:59
↓ 821.3%
40K· 24.85 mi
7:35/mi
3:11:28
↓ 200.3%
25.2M
8:10/mi
3:14:17
↑ 13↓ 160.2%
Finish· 26.22 mi
7:23/mi
3:21:48
↑ 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
Time1:39:44
Pace7:36 /mi
2nd Half
Distance13.11 mi
Time1:42:04
Pace7:47 /mi
📊Positive Split: 2.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:52:3823:457:3923:45
7:39
-
10K
6.21 mi11:16:1447:217:3723:36
7:36
-0:03
15K
9.32 mi11:39:251:10:327:3423:11
7:28
-0:08
20K
12.43 mi12:03:281:34:357:3724:03
7:44
+0:16
Half
13.11 mi12:08:371:39:447:365:09
7:33
-0:11
25K
15.53 mi12:27:021:58:097:3618:25
7:36
+0:03
30K
18.64 mi12:52:082:23:157:4125:06
8:05
+0:29
20M
20.00 mi13:02:352:33:427:4110:27
7:41
-0:24
21M
21.00 mi13:10:542:42:017:438:19
8:19
+0:38
35K
21.75 mi13:16:372:47:447:435:43
7:38
-0:41
23M
23.00 mi13:26:222:57:297:439:45
7:47
+0:09
24M
24.00 mi13:33:523:04:597:427:30
7:30
-0:17
40K
24.85 mi13:40:213:11:287:426:29
7:35
+0:05
25.2M
25.20 mi13:43:103:14:177:432:49
8:10
+0:35
Finish
26.22 mi13:50:413:21:487:427:31
7:23
-0:47

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

7:23 /mi

Average Pace

7:42 /mi

Slowest Pace

8:19 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:10:40

94% of race

Time at Steady Pace

11:08

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:42 /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 mi10:52:3823:457:3923:45
7:39
#10948
10K
6.21 mi11:16:1447:217:3723:36
7:36
#11096
15K
9.32 mi11:39:251:10:327:3423:11
7:28
#10640
20K
12.43 mi12:03:281:34:357:3724:03
7:44
#10791
Half
13.11 mi12:08:371:39:447:365:09
7:33
#10781
25K
15.53 mi12:27:021:58:097:3618:25
7:36
#10527
30K
18.64 mi12:52:082:23:157:4125:06
8:05
#10628
20M
20.00 mi13:02:352:33:427:4110:27
7:41
#10437
21M
21.00 mi13:10:542:42:017:438:19
8:19
#10344
35K
21.75 mi13:16:372:47:447:435:43
7:38
#10296
23M
23.00 mi13:26:222:57:297:439:45
7:47
#10146
24M
24.00 mi13:33:523:04:597:427:30
7:30
#10004
40K
24.85 mi13:40:213:11:287:426:29
7:35
#9856
25.2M
25.20 mi13:43:103:14:177:432:49
8:10
#9801
Finish
26.22 mi13:50:413:21:487:427:31
7:23
#9664
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi10948862986299868(Top 37%)8070(Top 53%)8070(Top 568%)
10K6.21 mi3.10 mi11096-1488704-758704-7511280(Top 42%)8782(Top 58%)8782(Top 618%)
15K9.32 mi3.11 mi10640+4568491+2138491+2139868(Top 37%)8070(Top 53%)8070(Top 568%)
20K12.43 mi3.11 mi10791-1518531-408531-4011221(Top 42%)8677(Top 57%)8677(Top 610%)
Half13.11 mi0.68 mi10781+108531853110540(Top 40%)8362(Top 55%)8362(Top 588%)
25K15.53 mi2.42 mi10527+2548404+1278404+1279499(Top 36%)7710(Top 51%)7710(Top 542%)
30K18.64 mi3.11 mi10628-1018394+108394+1011493(Top 43%)8577(Top 57%)8577(Top 603%)
20M20.00 mi1.36 mi10437+1918282+1128282+1128108(Top 30%)6668(Top 44%)6668(Top 469%)
21M21.00 mi1.00 mi10344+938210+728210+729313(Top 35%)7250(Top 48%)7250(Top 510%)
35K21.75 mi0.75 mi10296+488170+408170+409526(Top 36%)7363(Top 49%)7363(Top 518%)
23M23.00 mi1.25 mi10146+1508061+1098061+1098325(Top 31%)6600(Top 43%)6600(Top 464%)
24M24.00 mi1.00 mi10004+1427953+1087953+1087703(Top 29%)6141(Top 40%)6141(Top 432%)
40K24.85 mi0.85 mi9856+1487848+1057848+1057216(Top 27%)5764(Top 38%)5764(Top 405%)
25.2M25.20 mi0.35 mi9801+557806+427806+427495(Top 28%)5895(Top 39%)5895(Top 415%)
Finish26.22 mi1.02 mi9664+1377705+1017705+1017615(Top 29%)5944(Top 39%)5944(Top 418%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 37%
×21story building
+97ft-345ft

Overall

9868

Males

8070

M55-59

8070

5K→10K

3.1 - 6.2 mi

Top 42%
×5story building
+79ft-138ft

Overall

11280

Males

8782

M55-59

8782

10K→15K

6.2 - 9.3 mi

Top 37%
×3story building
+67ft-78ft

Overall

9868

Males

8070

M55-59

8070

15K→20K

9.3 - 12.4 mi

Top 42%
×5story building
+106ft-86ft

Overall

11221

Males

8677

M55-59

8677

20K→Half

12.4 - 13.1 mi

Top 40%
×2story building
+19ft-37ft

Overall

10540

Males

8362

M55-59

8362

Half→25K

13.1 - 15.5 mi

Top 36%
×4story building
+66ft-88ft

Overall

9499

Males

7710

M55-59

7710

25K→30K

15.5 - 18.6 mi

Top 43%
×9story building
+181ft-148ft

Overall

11493

Males

8577

M55-59

8577

30K→20M

18.6 - 20.0 mi

Top 30%
×5story building
+64ft-50ft

Overall

8108

Males

6668

M55-59

6668

20M→21M

20.0 - 21.0 mi

Top 35%
×8story building
+106ft-24ft

Overall

9313

Males

7250

M55-59

7250

21M→35K

21.0 - 21.8 mi

Top 36%
×7story building
+17ft-86ft

Overall

9526

Males

7363

M55-59

7363

35K→23M

21.8 - 23.0 mi

Top 31%
×5story building
+23ft-63ft

Overall

8325

Males

6600

M55-59

6600

23M→24M

23.0 - 24.0 mi

Top 29%
×6story building
+12ft-82ft

Overall

7703

Males

6141

M55-59

6141

24M→40K

24.0 - 24.9 mi

Top 27%
×1story
+6ft-20ft

Overall

7216

Males

5764

M55-59

5764

40K→25.2M

24.9 - 25.2 mi

Top 28%
×1story
+13ft-16ft

Overall

7495

Males

5895

M55-59

5895

25.2M→Finish

25.2 - 26.2 mi

Top 29%
×2story building
+22ft-21ft

Overall

7615

Males

5944

M55-59

5944

Passing Analysis

Category:
Athletes Passed
2371*
Passed By
1087
Net Change
+1284
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10948
5K → 10K235383-148#10948#11096
10K → 15K48630+456#11096#10640
15K → 20K106257-151#10640#10791
20K → Half3222+10#10791#10781
Half → 25K27117+254#10781#10527
25K → 30K141242-101#10527#10628
30K → 20M200*9+191#10628#10437
20M → 21M13542+93#10437#10344
21M → 35K7325+48#10344#10296
35K → 23M16616+150#10296#10146
23M → 24M1519+142#10146#10004
24M → 40K159*11+148#10004#9856
40K → 25.2M638+55#9856#9801
25.2M → Finish153*16+137#9801#9664
TOTALS2371*1087+1284

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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