Boston Marathon logo
BOSTON MARATHON 2023

Toshiyuki Terashima

Bib: 31844•M

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Top 30%
Gender (Male)
#0 / 15176
Top 44%
Masters (Masters Men)
#0 / 9891
Top 31%
Division (M50-54)
#0 / 2052
Top 27%
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
8:18/mi
25:48
↑ 97↓ 3451.5%
10K· 6.21 mi
7:11/mi
48:07
↑ 79↓ 1380.4%
15K· 9.32 mi
6:49/mi
1:09:17
↑ 67↓ 78
20K· 12.43 mi
7:10/mi
1:31:34
↑ 106↓ 860.1%
Half· 13.11 mi
7:07/mi
1:36:25
↑ 19↓ 370.5%
25K· 15.53 mi
7:16/mi
1:54:03
↑ 66↓ 880.2%
30K· 18.64 mi
7:31/mi
2:17:25
↑ 181↓ 1480.2%
20M
7:40/mi
2:27:50
↑ 64↓ 500.2%
21M
8:10/mi
2:36:00
↑ 106↓ 241.6%
35K· 21.75 mi
7:06/mi
2:41:19
↑ 17↓ 861.7%
23M
7:46/mi
2:51:02
↑ 23↓ 630.6%
24M
7:15/mi
2:58:17
↓ 821.3%
40K· 24.85 mi
7:50/mi
3:04:59
↓ 200.3%
25.2M
8:39/mi
3:07:58
↑ 13↓ 160.2%
Finish· 26.22 mi
7:40/mi
3:15:47
↑ 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
Time1:36:25
Pace7:21 /mi
2nd Half
Distance13.11 mi
Time1:39:22
Pace7:35 /mi
📊Positive Split: 3.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:47:3125:488:1825:48
8:18
-
10K
6.21 mi12:09:5048:077:4522:19
7:11
-1:07
15K
9.32 mi12:31:001:09:177:2621:10
6:49
-0:22
20K
12.43 mi12:53:171:31:347:2222:17
7:10
+0:21
Half
13.11 mi12:58:081:36:257:214:51
7:07
-0:03
25K
15.53 mi13:15:461:54:037:2117:38
7:16
+0:09
30K
18.64 mi13:39:082:17:257:2223:22
7:31
+0:15
20M
20.00 mi13:49:332:27:507:2310:25
7:40
+0:09
21M
21.00 mi13:57:432:36:007:268:10
8:10
+0:30
35K
21.75 mi14:03:022:41:197:255:19
7:06
-1:04
23M
23.00 mi14:12:452:51:027:269:43
7:46
+0:40
24M
24.00 mi14:20:002:58:177:267:15
7:15
-0:31
40K
24.85 mi14:26:423:04:597:276:42
7:50
+0:35
25.2M
25.20 mi14:29:413:07:587:282:59
8:39
+0:49
Finish
26.22 mi14:37:303:15:477:287:49
7:40
-0:59

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

6:49 /mi

Average Pace

7:28 /mi

Slowest Pace

8:39 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:40:49

51% of race

Time at Steady Pace

41:36

21% of race

Time at Slower Pace

53:22

27% of race

Average Pace: 7:28 /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 mi11:47:3125:488:1825:48
8:18
#16166
10K
6.21 mi12:09:5048:077:4522:19
7:11
#12202
15K
9.32 mi12:31:001:09:177:2621:10
6:49
#9450
20K
12.43 mi12:53:171:31:347:2222:17
7:10
#8749
Half
13.11 mi12:58:081:36:257:214:51
7:07
#8667
25K
15.53 mi13:15:461:54:037:2117:38
7:16
#8382
30K
18.64 mi13:39:082:17:257:2223:22
7:31
#8166
20M
20.00 mi13:49:332:27:507:2310:25
7:40
#8116
21M
21.00 mi13:57:432:36:007:268:10
8:10
#8101
35K
21.75 mi14:03:022:41:197:255:19
7:06
#7991
23M
23.00 mi14:12:452:51:027:269:43
7:46
#7963
24M
24.00 mi14:20:002:58:177:267:15
7:15
#7859
40K
24.85 mi14:26:423:04:597:276:42
7:50
#7876
25.2M
25.20 mi14:29:413:07:587:282:59
8:39
#7894
Finish
26.22 mi14:37:303:15:477:287:49
7:40
#7946
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi1616610758107585260(Top 20%)4864(Top 32%)4864(Top 237%)
10K6.21 mi3.10 mi12202+39649206+15529206+15527975(Top 30%)6922(Top 46%)6922(Top 337%)
15K9.32 mi3.11 mi9450+27527840+13667840+13665260(Top 20%)4864(Top 32%)4864(Top 237%)
20K12.43 mi3.11 mi8749+7017407+4337407+4336920(Top 26%)6151(Top 41%)6151(Top 300%)
Half13.11 mi0.68 mi8667+827357+507357+507226(Top 27%)6395(Top 42%)6395(Top 312%)
25K15.53 mi2.42 mi8382+2857154+2037154+2037112(Top 27%)6230(Top 41%)6230(Top 304%)
30K18.64 mi3.11 mi8166+2166976+1786976+1787357(Top 28%)6299(Top 42%)6299(Top 307%)
20M20.00 mi1.36 mi8116+506927+496927+497904(Top 30%)6530(Top 43%)6530(Top 318%)
21M21.00 mi1.00 mi8101+156900+276900+278398(Top 32%)6704(Top 44%)6704(Top 327%)
35K21.75 mi0.75 mi7991+1106821+796821+795968(Top 22%)5221(Top 34%)5221(Top 254%)
23M23.00 mi1.25 mi7963+286780+416780+418126(Top 31%)6474(Top 43%)6474(Top 315%)
24M24.00 mi1.00 mi7859+1046694+866694+866040(Top 23%)5138(Top 34%)5138(Top 250%)
40K24.85 mi0.85 mi7876-176689+56689+58878(Top 33%)6740(Top 44%)6740(Top 328%)
25.2M25.20 mi0.35 mi7894-186696-76696-710358(Top 39%)7456(Top 49%)7456(Top 363%)
Finish26.22 mi1.02 mi7946-526702-66702-69746(Top 37%)7138(Top 47%)7138(Top 348%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 20%
×21story building
+97ft-345ft

Overall

5260

Males

4864

M50-54

4864

5K→10K

3.1 - 6.2 mi

Top 30%
×5story building
+79ft-138ft

Overall

7975

Males

6922

M50-54

6922

10K→15K

6.2 - 9.3 mi

Top 20%
×3story building
+67ft-78ft

Overall

5260

Males

4864

M50-54

4864

15K→20K

9.3 - 12.4 mi

Top 26%
×5story building
+106ft-86ft

Overall

6920

Males

6151

M50-54

6151

20K→Half

12.4 - 13.1 mi

Top 27%
×2story building
+19ft-37ft

Overall

7226

Males

6395

M50-54

6395

Half→25K

13.1 - 15.5 mi

Top 27%
×4story building
+66ft-88ft

Overall

7112

Males

6230

M50-54

6230

25K→30K

15.5 - 18.6 mi

Top 28%
×9story building
+181ft-148ft

Overall

7357

Males

6299

M50-54

6299

30K→20M

18.6 - 20.0 mi

Top 30%
×5story building
+64ft-50ft

Overall

7904

Males

6530

M50-54

6530

20M→21M

20.0 - 21.0 mi

Top 32%
×8story building
+106ft-24ft

Overall

8398

Males

6704

M50-54

6704

21M→35K

21.0 - 21.8 mi

Top 22%
×7story building
+17ft-86ft

Overall

5968

Males

5221

M50-54

5221

35K→23M

21.8 - 23.0 mi

Top 31%
×5story building
+23ft-63ft

Overall

8126

Males

6474

M50-54

6474

23M→24M

23.0 - 24.0 mi

Top 23%
×6story building
+12ft-82ft

Overall

6040

Males

5138

M50-54

5138

24M→40K

24.0 - 24.9 mi

Top 33%
×1story
+6ft-20ft

Overall

8878

Males

6740

M50-54

6740

40K→25.2M

24.9 - 25.2 mi

Top 39%
×1story
+13ft-16ft

Overall

10358

Males

7456

M50-54

7456

25.2M→Finish

25.2 - 26.2 mi

Top 37%
×2story building
+22ft-21ft

Overall

9746

Males

7138

M50-54

7138

Passing Analysis

Category:
Athletes Passed
8674*
Passed By
454
Net Change
+8220
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16166
5K → 10K39651+3964#16166#12202
10K → 15K2753*1+2752#12202#9450
15K → 20K7021+701#9450#8749
20K → Half831+82#8749#8667
Half → 25K2894+285#8667#8382
25K → 30K25034+216#8382#8166
30K → 20M10252+50#8166#8116
20M → 21M8267+15#8116#8101
21M → 35K1133+110#8101#7991
35K → 23M9769+28#7991#7963
23M → 24M12218+104#7963#7859
24M → 40K5370-17#7859#7876
40K → 25.2M1735-18#7876#7894
25.2M → Finish4698-52#7894#7946
TOTALS8674*454+8220

* 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
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing